Find the value of r so the line that passes through each pair has the given slope. 1. $\displaystyle (r, 3), (7, r), m = -\frac{1}{5}$
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Originally Posted by Phresh Find the value of r so the line that passes through each pair has the given slope. 1. $\displaystyle (r, 3), (7, r), m = -\frac{1}{5}$ $\displaystyle \frac{\Delta y}{\Delta x} = \frac{r-3}{7-r} = -\frac{1}{5}$ Multiply out: $\displaystyle 5(r-3) = -(7-r)$ And solve for $\displaystyle r$
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