# What is the slope of for the line that goes through (-5, 9) and (-5, -5)?

$m = \infty \mathmr{and} - \infty$
$m = \frac{{y}_{1} - {y}_{2}}{{x}_{1} - {x}_{2}}$
$m = \frac{9 - \left(- 5\right)}{- 5 - \left(- 5\right)} = \frac{15}{0}$
The slope is $\infty \mathmr{and} - \infty$