Question

What is the average rate of change for the first 4 years

Answer 1

according to the definition of the average rate of change over an interval [a,b] is defined as

`(f(b)-f(a))/(b-a)`

define the points over the interval (0,4)

(0,1) & (4,5)

replace in the formula

`(5-1)/(4-0)=(4)/(4)=1`

the average rate of change is 1.