# Thread: Slope Help Please.

1. ## Slope Help Please.

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

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

2. Originally Posted by Phresh
Find the value of r so the line that passes through each pair has the given slope.

1. $(r, 3), (7, r), m = -\frac{1}{5}$
$\frac{\Delta y}{\Delta x} = \frac{r-3}{7-r} = -\frac{1}{5}$

Multiply out:
$5(r-3) = -(7-r)$

And solve for $r$