# How do you find the average rate of change of f(x) = 2x^2 + 9  between points (4,41) and (7,107)?

Average rate of change would be (f(7)-f(4))/((7-4) f(7) is 107 and f(4) is 41 hence,
average rate of change would be= $\frac{107 - 41}{7 - 4} = \frac{66}{3} = 22$