Please help with questions part B and C

Answer:
A: days: 2 and rental cost: 480
B: y=60x
Step-by-step explanation:
The daily rental cost is 60 dollars, because 180/3=60 and 300/5=60. Now you can say that y(rental cost) = 60x(daily cost times x(days).
Hope this helps! If you still have questions, just ask.