## Precalculus (6th Edition)

$$\text{slope is undefined}$$
RECALL: The slope $m$ of the line that contains the points $(x_1, y_1)$ and $(x_2, y_2)$ can be found using the formula: $$m=\dfrac{y_2-y_1}{x_2-x_1}$$ Use the formula above to obtain: $$m=\dfrac{-2-6}{5-5} \\m=\dfrac{-8}{0} \\\text{slope is undefined}$$
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