Question 3 When renting a car, the rate is $35 per day, but you also have to pay a flat service fee of $43. Using x (for days) and f(x) (for cost), write a function to model this situation. O f(x) = 43x + 35 O f(x) = -35x - 43 O f(x) = 35x + 43 O f(x) = 35x - 43