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Math Help - Is this right or wrong?

  1. #1
    Junior Member
    Joined
    Jun 2005
    Posts
    58

    Unhappy Is this right or wrong?

    Write an equation in slop-intercet form for the line through points (2,4) and (6,-2).

    What I did was:

    -2 - 4 -6 3
    ------ = ---- = ---
    6 - 2 4 2


    Then

    y - 4 = -3/2(x-2)

    y - 4 = -3/2x - 2

    answer

    y = -3/2x + 2

    Is this right?
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  2. #2
    MHF Contributor
    Joined
    Apr 2005
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    1,631
    You are correct up to the line
    y - 4 = (-3/2)(x-2)

    The continuation should be like this
    y -4 = -(3/2)x -2(-3/2)
    y -4 = -(3/2)x +3
    y = -(3/2)x +3 +4
    y = -(3/2)x +7 ----answer.

    ----------------
    If the answer were
    y = -(3/2)x + 2,
    would points (2,4) and (6,-2) be in that line?
    Last edited by ticbol; July 3rd 2005 at 06:16 PM.
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  3. #3
    Junior Member
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    thank you.
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