The function f(x)=80(1.5)^x models a bacteria population after x hours. How does the average rate of change between Hours 4 and 8 compare to the average rate of change between Hours 0 and 4? Answers: The average rate of change is 1.5 times as fast The average rate of change is 5.0625 times as fast The average rate of change is 2.25 times as fast. The average rate of change is 4 times as fast.