Answer
$m=-\dfrac{1}{2}$
Work Step by Step
Using $m=\dfrac{y_1-y_2}{x_1-x_2}$ or the Slope Formula, then the slope of the line containing the given points, $(
-2,3
) \text{ and } (
-6,5
)$, is
\begin{array}{l}
m=\dfrac{3-5}{-2-(-6)}
\\\\
m=\dfrac{3-5}{-2+6}
\\\\
m=\dfrac{-2}{4}
\\\\
m=\dfrac{-1}{2}
\\\\
m=-\dfrac{1}{2}
.\end{array}