An amusement park charges a fee of 5$ each time you enter the park .The cost of each ride is 2.50.Which expression shows the cost C (in dollars) as a function of the number of rides r you go on at the amusement park during one visit

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)