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tinaballerina Group Title

Which is the equation to the line passing through points (2, -7) and (5, -1)?

  • one year ago
  • one year ago

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  1. tinaballerina Group Title
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    y = 2x - 8 y = - 2x + 9 y = 2x - 11 y = - 2x + 6

    • one year ago
  2. tinaballerina Group Title
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    those are the answers.

    • one year ago
  3. hartnn Group Title
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    do u know how to find slope when 2 points are given ?

    • one year ago
  4. tinaballerina Group Title
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    No

    • one year ago
  5. hartnn Group Title
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    The slope of the line through points (x1,y1) and (x2,y2) is given by : \(\huge m=\frac{y_1-y_2}{x_1-x_2}\) now,just put the values and find m.

    • one year ago
  6. hartnn Group Title
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    could u find m=... ?

    • one year ago
  7. tinaballerina Group Title
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    No, im having a difficult time, i think its due to the early-ness. haha

    • one year ago
  8. hartnn Group Title
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    \(\huge m=\frac{y_1-y_2}{x_1-x_2}=\frac{-7-(-1)}{2-5}=...?\)

    • one year ago
  9. tinaballerina Group Title
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    -6/-3

    • one year ago
  10. hartnn Group Title
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    m= -6/-3 = ..... ?

    • one year ago
  11. Kainui Group Title
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    It might be easier if you have a graphing calculator. Make a line that looks like: y=(2/3)x and then change the slope around a bit to figure it out and see why the slope is rise/run by going to the "trace" option on your calculator and trying things out, like when x=3.

    • one year ago
  12. tinaballerina Group Title
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    2

    • one year ago
  13. hartnn Group Title
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    yes, m=2

    • one year ago
  14. Compassionate Group Title
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    Now use the first points given and the slope. Plug it into the equation: y - y1 = m(x - x1)

    • one year ago
  15. hartnn Group Title
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    now take any point, say (5,-1) and put it in y - y1 = m(x - x1)

    • one year ago
  16. hartnn Group Title
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    x1=5,m=2,y1=-1 isolate y

    • one year ago
  17. tinaballerina Group Title
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    -_-

    • one year ago
  18. Compassionate Group Title
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    Tina, let me make it easier for you. y - y1 = m(x - x1) y - (-1) = 2(x - 5) <-- Solve for y

    • one year ago
  19. tinaballerina Group Title
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    Good lord this is terrible. I feel so confused.

    • one year ago
  20. Compassionate Group Title
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    Okay. What are you confused with?

    • one year ago
  21. tinaballerina Group Title
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    Nothing. I think i'm going to skip this! I have to have it done by later tonight. I think im going to rest now haha thanks though:)

    • one year ago
  22. Compassionate Group Title
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    Bye.

    • one year ago
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