This formula models Anita's salary for the last seven years: un = 847n + 17109. The variable n represents the number of years of experience she has, and un represents her salary in dollars.
a. What did she earn in the fifth year? What did she earn in her first year?
(Think carefully about what n represents.)
b. What is the rate of change of her salary?
c. What is the first year Anita's salary will be more than $30,000?