## Intermediate Algebra (12th Edition)

We are given that the slope $m$ of the line passing through the distinct points $(x_{1},y_{1})$ and $(x_{2},y_{2})$ is defined as: $m=\frac{rise}{run}=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}$ (where $x_{2}\ne x_{1}$) Therefore, $m=\frac{-5-(-5)}{3-2}=\frac{-5+5}{1}=\frac{0}{1}=0$.