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Math Help - need some help with this problem

  1. #1
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    need some help with this problem

    I need some help with this problem could you show me how to answer it and could you also graph it please.

    determain weather the lines through each pair of points are parallel or perpendicular

    2,6 and -2,8

    0,3 and 1,5
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  2. #2
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    Quote Originally Posted by robpez View Post
    2,6 and -2,8
    Slope is,
    m1=(6-8)/(2-(-2))=-2/(4)=-1/2


    0,3 and 1,5
    Slope is,
    m2=(3-5)/(0-1)=(-2)/(-1)=2

    Since,
    m1m2=-1
    We now that the lines are perpendicular.
    Last edited by ThePerfectHacker; September 27th 2006 at 05:05 AM.
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  3. #3
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by ThePerfectHacker View Post
    Since,
    m1m2=1
    We now that the lines are perpendicular.
    Slight typo here, this should be m1m2 = -1 means the lines are perpendicular.

    -Dan

    (POST CORRECTED)
    Last edited by ThePerfectHacker; September 27th 2006 at 05:04 AM.
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