The function f(x)=400(1.5)x models an insect population after x months. How does the average rate of change between Months 2 and 4 compare to the average rate of change between Months 0 and 2? The average rate of change is 3.125 times as fast. The average rate of change is 2 times as fast. The average rate of change is 1.5 times as fast. The average rate of change is 2.25 times as fast.