Does this graph show a function? Explain how you know. • A. No; the graph fails the vertical line test.
• B. Yes; there are no y-values that have more than one x-value.
O C. No; there are y values that have more than one x-value.
D Yes; the graph passes the vertical line test.

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?