Question

Rate of Change between August and October

Answer 1

The rate of change is the ratio between the change in the y and x coordinates. The students ranged from 65 to 95 in two months, so the rate is

`(95-65)/(2)=(30)/(2)=15`

Answer 2

15 students per month

Explanation:

The rate of change is calculated as

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

f(b) = 95 ← number of students in October

f(a) = 65 ← number of students in August

b - a = 2 ← difference in months

Thus

rate of change =
`(95-65)/(2)` =
`(30)/(2)` = 15