The owner of a small restaurant bought 75 kilograms of rice. Each week, the restaurant uses 4.5 kilograms of rice. Function r(w) gives the remaining amount of rice, in kilograms, as a function of the number of weeks since the restaurant owner bought the rice.
What is the initial value? r(0) =
How much rice after 6 weeks? r(6) =
How much rice after 12 weeks? r(12) =