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anonymous

  • 5 years ago

Hello I really need help with one homework question

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  1. anonymous
    • 5 years ago
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    what question is it?

  2. anonymous
    • 5 years ago
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    Find an equation of the line containing the given pair of points (-2,-4) and (-8,-9)

  3. anonymous
    • 5 years ago
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    easy

  4. anonymous
    • 5 years ago
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    Great because I have been at it for over an hour!

  5. anonymous
    • 5 years ago
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    hahaha. ok first draw a cartesian plane

  6. anonymous
    • 5 years ago
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    ok

  7. anonymous
    • 5 years ago
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    you know what that is? yes? ok then plot the two points on the plane

  8. anonymous
    • 5 years ago
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    Ok

  9. anonymous
    • 5 years ago
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    have you done that? then draw a line between the two points on the graph

  10. anonymous
    • 5 years ago
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    Done

  11. anonymous
    • 5 years ago
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    ok so now you have to draw the line so that it crosses the x and y axis

  12. anonymous
    • 5 years ago
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    just extend the line

  13. anonymous
    • 5 years ago
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    ok done

  14. anonymous
    • 5 years ago
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    good so now do you know what rise / run is?

  15. anonymous
    • 5 years ago
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    No

  16. anonymous
    • 5 years ago
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    ok so umm, what are the points when you extend the line to the x and y axis?

  17. anonymous
    • 5 years ago
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    -2,2

  18. anonymous
    • 5 years ago
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    good. ok so um,.. hold on let me do this in my head for a sec ok? so um,... while you wait tell me a bit about urself.

  19. anonymous
    • 5 years ago
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    I am a student and university of phoenix. I am not good at math at all.

  20. anonymous
    • 5 years ago
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    In my help page it says to find the slope first

  21. anonymous
    • 5 years ago
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    yes you have to find the slope first

  22. anonymous
    • 5 years ago
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    to find the slope you have to do rise over run

  23. anonymous
    • 5 years ago
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    I come up with -5/6 is that right?

  24. anonymous
    • 5 years ago
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    hold on i'm a bit slow

  25. anonymous
    • 5 years ago
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    sorry about that i'm just learning it myself

  26. anonymous
    • 5 years ago
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    it willl take a while. sorry

  27. anonymous
    • 5 years ago
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    sorry to interrupt.... the slope is 5/6

  28. anonymous
    • 5 years ago
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    ya i think so. sorry i'm not very good, i'm trying my best. ok um. have you heard of y2-y2/x2-x1= ?

  29. anonymous
    • 5 years ago
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    yea that is the same formula I used but my answer came up with a negative 5/6

  30. anonymous
    • 5 years ago
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    two negatives make a positive

  31. anonymous
    • 5 years ago
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    Ok then onto the problem then how do I work this in

  32. anonymous
    • 5 years ago
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    ok well you work out what 5/6 is and that's .833

  33. anonymous
    • 5 years ago
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    ok

  34. anonymous
    • 5 years ago
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    =0.833(x-8) =

  35. anonymous
    • 5 years ago
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    ok

  36. anonymous
    • 5 years ago
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    ok so the answer is y=0.833x-2.336

  37. anonymous
    • 5 years ago
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    No they gave the answer as 5/6x-7/3

  38. anonymous
    • 5 years ago
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    use the point-slope form.. y-y1 = m (x-x1) take one given point and put in the x and y coordinates y + 4 =5/6 (x+2) isolate y: y = 5/6 (x + 2) - 4 expand and collect like terms: y = (5/6) x +5/3 - 4 y = (5/6) x - 7/3

  39. anonymous
    • 5 years ago
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    Ok well I already got that one wrong so now I have a new one (-1,-8) and (-7,-6)

  40. anonymous
    • 5 years ago
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    you still there?

  41. anonymous
    • 5 years ago
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    slope = -2/6 = -1/3

  42. anonymous
    • 5 years ago
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    The answer is as you posted above?

  43. anonymous
    • 5 years ago
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    ? you want the equation of the line right? hang on...

  44. anonymous
    • 5 years ago
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    Ok Thanks!

  45. anonymous
    • 5 years ago
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    y = (-1/3) x - 25/3

  46. anonymous
    • 5 years ago
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    you are great thanks!!!!!!!!!

  47. anonymous
    • 5 years ago
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    ^o^ happy to help.

  48. anonymous
    • 5 years ago
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    How about this one (-10,8);7x-5y=2

  49. anonymous
    • 5 years ago
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    what are we looking for?

  50. anonymous
    • 5 years ago
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    Write an equation of the line containing the given point and parallel to the given line. Express your answer as y-mx+b

  51. anonymous
    • 5 years ago
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    y = (2/5) x + 22

  52. anonymous
    • 5 years ago
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    Sorry I wrote that wrong it is (4,8);x-7y=5. I sent you my example question sorry.

  53. anonymous
    • 5 years ago
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    Sorry it is x+7y not x-7y

  54. anonymous
    • 5 years ago
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    y = (-1/7) x + 60/7

  55. anonymous
    • 5 years ago
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    I really do not understand how you solve these ones but thanks. Can you help me with a couple more or is that not ok?

  56. anonymous
    • 5 years ago
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    Ok, what does it mean for two lines to be parallel?

  57. anonymous
    • 5 years ago
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    Is that OK?

  58. anonymous
    • 5 years ago
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    Is what ok?

  59. anonymous
    • 5 years ago
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    I would like to have help with another question

  60. anonymous
    • 5 years ago
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    That's fine, but I was going to explain how to go about finding the answer to this one since you didn't actually learn anything from Applekiwi's response.

  61. anonymous
    • 5 years ago
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    If you'd like to work on another problem, that's fine too.

  62. anonymous
    • 5 years ago
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    I would like both help with solving the problem and explaining

  63. anonymous
    • 5 years ago
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    Which problem?

  64. anonymous
    • 5 years ago
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    (-2,7; 5x=4y+3

  65. anonymous
    • 5 years ago
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    You want a parallel line that intersects (-2,7)?

  66. anonymous
    • 5 years ago
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    Write an equation of the line containing the given point and parallel to the given line. Express your answer as y-mx+b

  67. anonymous
    • 5 years ago
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    Sorry yes i forgot the other )

  68. anonymous
    • 5 years ago
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    Ok, so what does it mean for two lines to be parallel?

  69. anonymous
    • 5 years ago
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    They extend in the same direction

  70. anonymous
    • 5 years ago
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    Equidistant at all points, and never converging or diverging

  71. anonymous
    • 5 years ago
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    Are you still there?

  72. anonymous
    • 5 years ago
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    Those are both good definitions. Let me give you a third. The reason that they are equidistant at all points is because they both have the same slope right?

  73. anonymous
    • 5 years ago
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    Ok

  74. anonymous
    • 5 years ago
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    Do you agree that makes sense?

  75. anonymous
    • 5 years ago
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    Yes

  76. anonymous
    • 5 years ago
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    So what is the slope of your original line?

  77. anonymous
    • 5 years ago
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    5x=4y+3

  78. anonymous
    • 5 years ago
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    5/4x-3/4?

  79. anonymous
    • 5 years ago
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    that equals y, but what is the slope?

  80. anonymous
    • 5 years ago
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    I don't know. How do I find the slope?

  81. anonymous
    • 5 years ago
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    well, the slope intercept form of a line is y=mx + b where m is the slope, and b is the intercept. is that the form you have it in?

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