how to find net change

Question

A function is given.

h(t) = 2t² − t;   t = 2, t = 5

(a) Determine the net change between the given values of the variable.

(b) Determine the average rate of change between the given values of the variable.

Answer 1

a. 2(5²) - 5 - [2(2²) - 2]

b.{2(5²) - 5 - [2(2²) - 2]} / (5 - 2)