Question

A football star earns a $12 million annual salary in 2010. In 2015 he will earn $14,500,000. What is the rate of change of his salary per year?

Answer 1

salary in 2010 = 12,000,000
salary in 2015 = 14,500,000

increment salary in 5 years
14,500,000 - 12,000,000
2,500,000

rate of change per year
2,500,000 / 5
500,000 dollars