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Math Help - Point Slope Form

  1. #1
    Junior Member
    Joined
    Sep 2008
    Posts
    40

    Point Slope Form

    Please help...totally confused!

    Use point-slope form to write the equation of the line with the given properties. Write the equation in general form (Ax + By = C).
    m = -3, passing through P(3, 9)

    So I got to the point-slope form...
    y=-3x+18
    How do I get it to the Ax+By=C form?

    THANK YOU!
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  2. #2
    Junior Member
    Joined
    Oct 2008
    Posts
    35
    you have the hard work done!

    y = -3x +18

    add 3x to both sides

    3x + y = 18

    A=3
    B=1
    c=18
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