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anonymous

  • one year ago

which equation represents the line passing through the points (3,2) and (-9,6) A. x-3y=9 B. x+3y=9 C. 3x-y=-9 D. 3x+y=9

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  1. Mehek14
    • one year ago
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    which one do you think?

  2. anonymous
    • one year ago
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    A

  3. Mehek14
    • one year ago
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    it's not A because the line has (3,-2) not (3,2)

  4. Mehek14
    • one year ago
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    but it has (-9,-6) not (-9,6)

  5. anonymous
    • one year ago
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    so i have to replace the point into the equation

  6. Mehek14
    • one year ago
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    yes and see which one is true

  7. Mehek14
    • one year ago
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    let's see B

  8. Mehek14
    • one year ago
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    we will use the ordered pair (3,2) x = 3 y = 2

  9. Mehek14
    • one year ago
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    so in the equation x+3y=9 substitute the values 3 + 3(2) = 9 3 + 3*2 = 9 is that true?

  10. anonymous
    • one year ago
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    yes

  11. Mehek14
    • one year ago
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    ok now let's try the second ordered pair (-9,6) x+3y=9 -9 + 3(6) = 9 -9 + 3 * 6 = 9 true?

  12. anonymous
    • one year ago
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    yes

  13. Mehek14
    • one year ago
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    so that is the equation for the line!

  14. anonymous
    • one year ago
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    thanks alot

  15. Mehek14
    • one year ago
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    yw ^_^

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