# Chapter 3 - Section 3.4 - The Slope of a Line - Exercise Set: 17

$m=-1$

#### Work Step by Step

We can use the slope formula to calculate the slope of a line, m, that goes through two points. $m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}$ $m=\frac{4-2}{-3-(-1)}=\frac{2}{-3+1}=-\frac{2}{2}=-1$

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