Answer
$m=-2$
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 from the points shown in the graph: $m=\frac{-2-2}{2-0}$
We simplify above and below the fraction bar with subtraction: $m=\frac{-4}{2}$
Then, we divide: $m=-2$