### Home > PC3 > Chapter 1 > Lesson 1.1.6 > Problem1-59

1-59.

A linear function includes the points $(2,7)$ and $(4,8)$. What is the average rate of change, $\frac { \Delta y } { \Delta x }$, between these two points? What will happen to the average rate of change if you choose two other points on the graph of the function?

$\frac{\Delta\textit{x}}{\Delta\textit{y}}=\frac{y_{2} - y_{1}}{x_{2} - x_{1}}$