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Thread: Slope Question, Help please!

  1. #1
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    Slope Question, Help please!

    Find the value of r so the line that passes through each pair has the given slope.

    1. $\displaystyle (-5, r), (1, 3), m = \frac{7}{6}$

    2. (-7, 2), (-8, r), m = -5
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  2. #2
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    Slope = rise/run
    Slope = $\displaystyle {y_2} - {y_1} / {x_2} - {x_1}$

    1)

    Let -5 be $\displaystyle {x_1}$ and 1 be $\displaystyle {x_2}$ and
    Let r be $\displaystyle {y_1}$ and 3 be $\displaystyle {y_2}$

    Plugging in, we get the equation

    3 - r / 1 - (-5) = 7/6
    3 - r / 6 = 7/6
    3 - r = 7
    r = -4

    Try the next one by yourself.
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