At the craft store lisa bought 3 clay blocks and 2 molds for $15.00. tony bought 6 clay blocks and 1 mold for $19.00

Charlie is at an amusement park that has 18 different rides. each ride costs $1.75. the function c(r) = 1.75r represents the total amount of money that charlie will spend if he goes on r rides, but he never goes on the same one more than once. what domain and range are reasonable for the function?