Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

85295james Group Title

Write a rule for the linear function in the graph.

  • 2 years ago
  • 2 years ago

  • This Question is Closed
  1. 85295james Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    the lines are (4,3) (3,-1)

    • 2 years ago
  2. 85295james Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    A. y =-4 x + 13 B. y = -4x – 13 C. y =4 x – 13

    • 2 years ago
  3. theEric Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Do you know the general "point-slope" formula?\[y=mx+b\] Are you familiar with that?

    • 2 years ago
  4. 85295james Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    no

    • 2 years ago
  5. theEric Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Alright, well this formula is how you define a line! For a line, the "m" and "b" variables will be numbers instead. "m" is "slope" and "b" is "y-intercept" Are either of those familiar to you? And are you familiar with plotting points on a graph using a formula?

    • 2 years ago
  6. 85295james Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1346091835332:dw|

    • 2 years ago
  7. theEric Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    I can immediately answer your problem, but I want to work it throug with you.

    • 2 years ago
  8. theEric Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    And I agree with your plot! :)

    • 2 years ago
  9. 85295james Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    yes i would like that

    • 2 years ago
  10. eliassaab Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    You do not really need to do all this for a multiple choice question.

    • 2 years ago
  11. eliassaab Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Just replace in the 3 equations and see which one works

    • 2 years ago
  12. eliassaab Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    C would be the answer.

    • 2 years ago
  13. theEric Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    eliassaab is correct. eliassaab recommends that you take the x value of one point and put it into the equation, you should get the y value of that point from calculating the correct option.

    • 2 years ago
  14. theEric Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    There's another quick method to determine if a formua might be right, just by looking to see if "m" and "b" are positive on your plot and then finding the choice that has those same positive or negatives. That requires a little knowledge of how it works anyway. Wold you like to work through this as if there are no multiple choices?

    • 2 years ago
  15. theEric Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    That would be helpful for both finding the answer without choices, and understanding the concept some more in a different way than the substitution method of eliassaab.

    • 2 years ago
  16. 85295james Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    thank you

    • 2 years ago
  17. theEric Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Would you like to work through it as if there were no multiple choice, then? :) eliassaab's method will work every time for multiple choice, though.

    • 2 years ago
  18. theEric Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    By looking at a picture with no points, you can narrow down the possible equations. By going through some algebra, you can find the equation by knowing any two points on the line.

    • 2 years ago
  19. 85295james Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    no thank you but i need more help with other questions

    • 2 years ago
  20. theEric Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Alright. I'll look for them on here! :)

    • 2 years ago
  21. theEric Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    And C is the answer, as eliassaab said :)

    • 2 years ago
  22. 85295james Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    thanks =)

    • 2 years ago
  23. theEric Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    No problem!!

    • 2 years ago
    • Attachments:

See more questions >>>

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.