Answer:
c. Ellipse
Step-by-step explanation:
Detailed solution is given below:
rental fee = $6
average cost for 6 hours = $2.50/hour.
x + 1.50*6 = 15 where x = the initial rental fee
x + 9 = 15
x = $6
The rental fee is $6.
For 6 hours, the cost per hour works out to 15/6 = $2.50
