Answer
The slope is $1$.
Work Step by Step
The slope of the line through the points $(x_1, y_1)$ and $(x_2, y_2)$ is given by the formula:
$m=\dfrac{y_2-y_1}{x_2-x_1}$
Use the formula above to obtain:
$m=\dfrac{3-8}{-2-3}=\dfrac{-5}{-5}=1$