#### Answer

$-\frac{1}{5}$

#### Work Step by Step

To find the slope of a line using two points, $(x_1, y_1)$ and $(x_2, y_2)$, we use the formula $m=\frac{y_2-y_1}{x_2-x_1}$. Substituting the points into the formula gives
$m=\frac{-3-(-1)}{8-(-2)}=\frac{-2}{10}=-\frac{1}{5}$