Help! Please g(x) = x + 3 What does g(x) do to inputs (select all that apply)

1. It multiplies them by 3
2. It divides them by 3
3. It adds 3 to them
4. It subtracts 3 from them

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?