For a function f(z) and a particular input value z = a, then we may write the difference
 quotient as
 f(a+h)-f(a)
 h
 where h 0.
 Now, let f(z)=z³-14z and consider the input value a = 3. We could now write the
 difference quotient as
 f(3+h)-f(3)
 h
 where h / 0.
 Use this difference quotient to calculate the average rate of change of f(z) from z = 3 to
 z=3+h for the following particular values of h.
 When h = 0.2, the average rate of change of f(z) is
 When h= 0.1, the average rate of change of f(z) is
 When h= 0.01, the average rate of change of f(a) is
 When h= -0.01, the average rate of change of f(z) is
 When h-0.1, the average rate of change of f(z) is
 When h=-0.2, the average rate of change of f(z) is