SOLUTION
In 2010, the cost for the car was $21,000 and in 2019 it was $24,000
The increase in price is

Percentage increase in price is calculated as

This becomes

Therefore Percent increase is the increase in price is 14.29%
(b) The average increase is calculated as

2010 to 2019 is 9 years. So the average increase is

Therefore, the average increase is $333.33 per year