## College Algebra (10th Edition)

We calculate the slope using the points (3,-2) and (1,6): $slope=m=\displaystyle \frac{y_{2}-y_{1}}{x_{2}-x_{1}}$ $=\displaystyle \frac{6-(-2)}{1-3}$ $=\displaystyle \frac{8}{-2}$ $=-4$