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 diferent customers are shown in the table. Write an equation for the function
in slope-intercept form. Then, find the cost of a fil-up anda car wash for a customer with a truck whose tank
size is29 gallons.
Tank size (gal) (z)
9
16
20
Total cost (5) f (z)
20.35
33.65
41.25