the average rate of change

(1 point) Consider the function x) 2 2:2 + 4 and nd the following: a) The average rate of change between the points (1,f(1)) and (2, f(2)) . 1 555 b) The average rate of change between the points (a, f(a)) and (b, f(b)) . c) The average rate of change between the points (at, f(a:}) and (x + h, x + h}}