Answer:
C(r) = 5 + 2.5r
Step-by-step explanation:
An amusement park charges a fee of 5$ each time you enter the park. The cost of each ride is $2.50.
Therefore, the cost of r number of rides inside the park will be $2.5r.
Hence, the expression that shows the cost C (in dollars) as a function of the number of rides r, I go on at the amusement park during one visit will be
C(r) = 5 + 2.5r (Answer)