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9-6.

Another common rate of change we use is slope, . A linear function, f(x), includes a point (2, 7) and another point (4, 8). Find the average rate of change, , between these two points. What would happen to the slope if you chose 2 other points on the function? Homework Help ✎

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