Which linear function represents the table? a) y = 2x − 7 b) y = 2x + 7 c) y = −2x + 7 d) y = −2x − 7

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?