Let f(x) = 5√x + 1. a. What is the average rate of change of f over the interval from x = 3 to x = 4.5? b. What is the average rate of change of f over the interval from x = 4.5 to x = 6.8? c) What is the value of f(a +229)? (Hint: think of the average rate of change as a constant rate of change.) f(a + 229)