4-7 Word Problem Practice
Inverses of Linear Functions
1. BUSINESS Alisha started a baking business. She
spent $36 initially on supplies and can make 5 dozen
brownies at a cost of $12. She charges her customers
$10 per dozen brownies.
a. Write a function C(x) to represent Alisha's total
cost per dozen brownies.
b. Write a function E(x) to represent Alisha's earnings
per dozen brownies sold.

c. Find P(x)=E(x)-C(x). What does P(x) represent?
d. Find C-¹(x), E-¹(x), and P-¹(x).