Cation The cost to fill a car's tank with gas and get a car wash is a linear function of the capacity of the tank.
The costs of a fill-up and a car wash for three different customers are shown in the table. Write an
equation for the function in slope-intercept form. Then, find the cost of a fill-up and a car wash for a
customer with a truck whose tank size is 22 gallons.

Tank size (gal)
(x)
8
12
17
Total cost ($)
f(x)
21.10
29.90
40.90