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Math Help - how to find the equation? (easy question)

  1. #1
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    Question how to find the equation? (easy question)

    A line passes through the point (6, -7) and has a slope of -2 . Write an equation for this line.
    i think there was a formula for that but i forgot it
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  2. #2
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    Re: how to find the equation? (easy question)

    Use the formula Y = mx + b
    The point you gave us has values (x,y) and the slope you gave us is 'm'

    Knowing this...
    -7 = (-2)(6) + b
    -7 = -12 + b
    b = 5

    Now we write out the formula using the y-intercept(b) we calculated

    Y = -2x + 5
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  3. #3
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    Re: how to find the equation? (easy question)

    Hello, phyfreak!

    A line passes through the point (6, -7) and has a slope of -2 .
    Write an equation for this line.
    i think there was a formula for that, but i forgot it.

    Point-Slope Formula

    The line through the point (x_1,y_1) and having the slope m,

    . . has the equation: . y - y_1 \:=\:m(x-x_1)
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