Chapter 3 - Graphing Linear Functions - 3.5 - Graphing Linear Equations in Slope-Intercept Form - Exercises - Page 141: 8

The line falls from left to right. So, the slope is negative. Slope $m=-\frac{4}{5}$.

The line falls from left to right. So, the slope is negative. Let $(x_{1},y_{1})=(0,3)$ and $(x_{2},y_{2})=(5,-1)$. Slope $m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}=\frac{-1-3}{5-0}=\frac{-4}{5}=-\frac{4}{5}$.