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Math Help - Finding equation of a line given two points.

  1. #1
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    Finding equation of a line given two points.

    need help with this question If a line passes through the points (-2, -4) and (3, -1), the equation of the line is y + 4 = 3/5(x + _____).
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  2. #2
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    Using slope point form:y-y1=m(x-x1)
    where m=(y2-y1)/(x2-x1)
    Equation of line is

    5y+20=3x+6
    =>y+4=3/5(x+2)

    so the answer is 2 in the fill in the blanks .
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  3. #3
    Senior Member Dinkydoe's Avatar
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    See it like this:

    If f(x)= ax+b is the line passing through the given points:

    First we have: f(-2)= -2a+b=-4
     f(3) = 3a+b = -1

    From these 2 equations you can determine a,b
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  4. #4
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    Quote Originally Posted by daniel323 View Post
    need help with this question If a line passes through the points (-2, -4) and (3, -1), the equation of the line is y + 4 = 3/5(x + _____).
    Duplicate post. See here: http://www.mathhelpforum.com/math-he...help-asap.html

    Thread closed.
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