Answer
$m=\dfrac{9}{5}$
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, $(
0,9
) \text{ and } (
-5,0
)$, is
\begin{array}{l}
m=\dfrac{9-0}{0-(-5)}
\\\\
m=\dfrac{9-0}{0+5}
\\\\
m=\dfrac{9}{5}
.\end{array}