Ineed to know the answer to this question

Which statement about the graph of y = 8(0.25)^2

Define multiplicative inverse. give an example of a number and its multiplicative inverse.

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?