A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 5 years ago

Whats the y-intercept value: Y=11.5 times X + 1 +3.3

  • This Question is Closed
  1. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    4.3

  2. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    got it?

  3. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I got that, but I thought it was 0.

  4. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Its supposed to be the y intercept of a graph I'm working on, and it intercepts y at 0,0

  5. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    y=mx +c , right??

  6. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    not really. Here's what it looks like: http://img269.imageshack.us/i/grapheo.png/

  7. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    the trendline intercepts the y axis at 0,0

  8. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    hey ankur?

  9. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    anyone?

  10. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    y= 11.5x + 1t +3.3

  11. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    did you make that graph or is it part of the problem?

  12. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i made the graph.

  13. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    The problem is I have an answer for the y-intercept of the equation (4.3, which I don't want to know), when I need to know the y-intercept of that graph, which I think is 0,0

  14. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    no, that graph looks like it is going to intersect the y axis at about 4.3

  15. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    you made that graph based on your equation, right?

  16. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    why don't you extend the line on the graph and see where it meets the y axis?

  17. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yes i did

  18. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    and?

  19. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I did make it based on my equation, and i did extend the trendline.

  20. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    the trendline hits 0,0

  21. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    if you made the graph based on your equation, then it will automatically intersect the y axis at 4.3

  22. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    No, you must have made some mistake. if the line on the graph is the equation, then it has to intersect the y axis at 4.3

  23. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    actually, it will hit the y axis at 3.3

  24. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    because your x axis includes the teacher

  25. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    wait, what is your input? Is it the number of students ?

  26. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    how do you reckon I can fix this?

  27. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    number of students +1 teacher

  28. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    its the number of the students plus 1 teacher, and the other value is the total cost of the movie tickets for that amount of students + 1 teacher.

  29. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so lets call that class size. so the x axis is the class size. and the y axis is the cost. what is 3.3?

  30. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I'm not sure anymore. Its linear: C$=11.5 x N+ 1 + 3.3

  31. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    see, your input cannot be N+1. It is either the number of students alone or the number of students plus a teacher, who is always present.

  32. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    if you are taking your input as the total number of people who are going to the theater, then it should not matter if one of them is a teacher.

  33. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    but if you are taking the number of students alone as your input, then you have to do the N+1 business.

  34. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    wait I think i get it now, so N should be students +1 teacher

  35. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    1 teacher is always present no matter what. Its only the number of students who change.

  36. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so, if the number of students is 0, the teacher still ends up going to the theater by himself and pays the adult ticket price. which is 11.5 +3.3

  37. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i think the 3.3 is additional charge for adult.

  38. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so your y intercept should be 14.8, where your x axis is the number of students alone(not including the teacher)

  39. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i think you're right abuot the 3.3

  40. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so then total cost is y = 11.5(N+1)+3. that is, 11.5 dollars for each ticket for all the students and teacher, plus 3.3 for the adult charge.

  41. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so plot your graph with x axis as the number of students alone.

  42. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    then your y intercept will be if no students come for the class movie trip, that is, the adult teacher alone goes. so he will be charged 11.5 dollars, which is the charge for everyone +3.3 dollars for being adult.

  43. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    got it?

  44. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    please let me know if I have clarified your doubt. If there is no feedback, I cannot know whether to continue explaining or not.

  45. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    how can i put that in a two column table

  46. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Thanks for your help btw, I appreciate it.

  47. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    input (# of students N) | output (Cost) 0 | 14.8 1 | 14.8+11.5 ...... and so on

  48. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    n of students (+1 teacher)

  49. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    N is a variable, right? the teacher is always present. so he is constant. Only the number of students changes.

  50. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I gave you the equation too: y = (N+1)11.5 +3.3 y = 11.5N +14.8

  51. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yeah i know the 1 teacher is always present, always constant, and the number of students changes

  52. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    right, so what is the confusion?

  53. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    What title i have for that column

  54. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Total Number of Students + 1 teacher

  55. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    and below that, '1' because theres 0 students, but 1 teacher

  56. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    X axis is the number of students. x axis is the independent variable. y depends on x, so y axis is the dependent variable. the titles of x axis and y axis should be # of students and Cost, respectively.

  57. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    note that there is no x-intercept for this equation.

  58. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yup.

  59. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ill change that now...stay here though I reckon ive got more questions

  60. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Quick question, what is$11.50 after a 10% price rise? and $14.80

  61. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    what is 10% of 11.5?

  62. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    10 x 11.5 x100?

  63. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    no that wasnt right

  64. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    no kidding

  65. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    of is times

  66. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    cent = century = 100. percent = per- cent. per = for every. per-cent = for every 100. so if your share of profits is 10percent of total profit, it means you get 10 dollars for every 100 dollars the company makes. so you make 10/100 of what the company makes.

  67. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    So if your company makes 200 dollars profit, and your share is 20 % of the profit, you make 20/100 of 200 = 20 dollars.

  68. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    got it?

  69. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    $12.30? Is that the 10% price increase?

  70. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    sorry, that should have been 40.

  71. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    no

  72. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    what is 10% of 11.5?

  73. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    $11.50 + 1.15= $12.65 ?????

  74. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    wait my mistake, $12.65

  75. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    great.

  76. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    similarly find 10% increase in 14.8

  77. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I went 10x11.50 and then the % button

  78. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    then added that to 11.50

  79. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    understand what percent means and you wont have any confusion even if you have to do it without a calculator. see above.

  80. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    So I go 10 for every 100, divide 14.80 by 10. I remember that, just jump the decimal backwards to divide by how many zeros.

  81. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    okay so 10 % increase in 14.8 is 14.8+1.48

  82. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yup got it.

  83. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Number of Students (+1 teacher) | Cost 1 | 14.80

  84. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    my maths teacher wanted me to add the +1 to the amount of students+1 teacher column

  85. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Then your variable is not number of students. your variable is class size.

  86. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    in that case, it does not have a y intercept.

  87. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    this is heaps frustrating for me. its due tonight in the next few hours. and I dont understand much about maths, I'm really poor at it

  88. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    okay, for y intercept ti exist, the class size has to be zero. But the way you have defined your independent variable as (amount of students+1), your variable cannot be zero even if amount of students is 0. Do it my way. It is correct.

  89. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Please explain what your way (again!)

  90. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    y = 11.5N +14.8 plot that graph. x axis is number of students. y axis is cost.

  91. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    see above.

  92. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    or you can do it your way, if you shift the origin from 0,0 to 1,0

  93. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so its Cost=11.5 times Number of students plus 1 teacher's price

  94. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yes.

  95. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok, so thats the formula down.

  96. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yes, if you do it your math teacher's way, then it doesn't make any sense. The cost would be 3.3 even if no one, including the teacher went.

  97. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    How about the table? I'll show you what it looks like now: http://img839.imageshack.us/i/tableup.png/

  98. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ive been asked to use different numbers of the students, it doesnt have to be 1,2,3,4,5,6 etc.

  99. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yes, but if no-one goes in your teacher's method, the y-intercept is 3.3. So that means that the class pays 3.3 and no one goes, not even the teacher. In my way, if no one goes, it means only the students don't go. The teacher still goes no matter what. My way makes more sense than your math teacher's way.

  100. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Yeah fair point. So what do you suggest I do with the table?

  101. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    your table should read class size( teacher NOT included) and use the formula y = (N+1)11.5 +3.3

  102. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so for N = 0 , y = 14.8 N=1 y = 26.3 and so on.

  103. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I'm using 'Class size (teacher included in price)'

  104. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I guess, though I am not totally comfortable with that. You can argue with your teacher that his/her way does not make sense. you might get bonus points for that.

  105. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    its correct, but it shouldn't read that. because it is a variable that you are defining as class size. It has no other attributes.

  106. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    hang on, you changed it from y = 11.5N +14.8 to y = (N+1)11.5 +3.3

  107. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    dude, both are the same equation. Think about it before you post this silly stuff.

  108. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    its just proper semantics, that's all. y = (n+1)11.5 + 3.3 conveys the proper meaning of the equation.

  109. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i'll stick with y = 11.5N +14.8, we're not using brackets/parenthesis currently in class

  110. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok. thats up to you

  111. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i added a trendline, and displayed the equation on the chart but it says: y = 11.13x + 11.194 R² = 0.9993

  112. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i know whats wrong, the class number still had the teacher added.

  113. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    now its: y = 11.5x + 14.8 R² = 1 a perfect r2 value!

  114. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    what is R2 ? You can't expect people to know what you are talking about. you seem to be using some sort of software.

  115. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    is that good or bad that r2 is 1?

  116. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I thought you'd know that! R squared value. I don't know much about it, but I remember that if its 1 its perfect, if its below, its not great.

  117. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I probably know it. But i may have called is Z squared. What is R?

  118. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    The y-intercept (for the graph) is (0, 14.8)

  119. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    right,.

  120. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    The question says explain why it is this value

  121. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I say its because its linear, and it has a perfect r2 value, but I dont think thats right

  122. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    it is that value because thats the price of the ticket for an adult. Duh!

  123. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    lol thanks

  124. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    you are welcome. Please tell me your problem's done! :)

  125. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    almost.

  126. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so far every other question is going along smoothly, now I understand it better, thanks for your help.

  127. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    just hang around a bit longer....

  128. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    you are welcome

  129. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    just figured out slope by myself :D

  130. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    congratulations.

  131. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Last question now! :)

  132. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Write a mathematical model for the total cost for a class to visit the movies if the cost for 1 student is $s and for 1 teacher is $t when N students and 1 teacher attends Help!?

  133. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.