Chapter P - P.2 - Linear Models and Rates of Change - Exercises - Page 16: 10

$-\frac{8}{3}$

The slope can be found using the formula: $m=\frac{y_2-y_1}{x_2-x_1}$ $m=\frac{-\frac{1}{4}-\frac{3}{4}}{\frac{5}{4}-\frac{7}{8}}$ $m=\frac{-\frac{1}{4}-\frac{3}{4}}{\frac{10}{8}-\frac{7}{8}}$ $m=\frac{-\frac{4}{4}}{\frac{3}{8}}$ $m=-\frac{8}{3}$