Answer
$m=-\frac{2}{3}$
Work Step by Step
We can use the slope formula to calculate the slope of a line, m, that goes through two points.
$m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}$
$m=\frac{5-(-1)}{-6-3}=\frac{5+1}{-(6+3)}=-\frac{6}{9}=-\frac{2}{3}$