The function below shows the number of car owners f(t), in thousands, in a city in different years t:

f(t) = 0.25t^2 - 1.5t + 2.5

The average rate of change of f(t) from t = 5 to t = 8 is ______ thousand owners per year.

Question

The function below shows the number of car owners f(t), in thousands, in a city in different years t:

f(t) = 0.25t^2 - 1.5t + 2.5

The average rate of change of f(t) from t = 5 to t = 8 is ______ thousand owners per year.

imstuck · Answer

In order to figure this one out you need to find out what t is at 5 and what it is at 8.  Any ideas?

imstuck · Answer

First I recommend multiplying the equation by 100 to get rid of the decimals.  It makes it easier to understand the answer as well.

imstuck · Answer

are you there?  Do you need help with this?