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 26 gallons. Tank size (gal) (x) Total cost ($) f(x)
11 26.95
16 37.95
19 44.55

f(x) = 2.40x + 2.25
Cost for truck = $64.65
f(x) = 2.20x + 2.75
Cost for truck = $59.95
f(x) = 2.30x + 3.25
Cost for truck = $63.05
f(x) = 0.45x + 1.25
Cost for truck = $12.95