## Intermediate Algebra (12th Edition)

$slope=2$
To calculate the slope between points $(x_1,y_1)$ and $(x_2,y_2)$, we use the formula: $slope=m=\frac{y_2-y_1}{x_2-x_1}$ We see that the two blue points on the line are: $(1,-1)$ and $(3,3)$. We plug in the points into the slope equation: $slope=m=\frac{y_2-y_1}{x_2-x_1}=\displaystyle \frac{3-(-1)}{3-1}=\frac{4}{2}=2$