# Chapter 3 - Section 3.3 - Slope - Exercise Set - Page 241: 9

m=undefined The line is vertical.

#### Work Step by Step

m=$\frac{y_2-y_1}{x_2-x_1}$ m=$\frac{-2-3}{5-5}$ m=$\frac{-5}{0}$ m=undefined The slope is undefined, therefore the line is vertical.

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