Answer
$m=0$
Work Step by Step
To find the slope, we use the formula $m=\frac{y_2-y_1}{x_2-x_1}$.
We plug in the $x$ and $y$ values given to us in the coordinate pairs: $m=\frac{5-5}{-8-2}$
We simplify above and below the fraction bar with subtraction: $m=\frac{0}{-10}$
Then, we divide the fraction: $m=0$
