Answer: A
5.64-4.44 = 1.20
6.84-5.64 = 1.20
8.04-6.04 = 1.20
Each additional two hours adds $1.20 to the rental, so a slope of $0.60 per hour. That's the incremental cost per hour.
Two hours costs $4.44 so zero hours costs 4.44-1.20=$3.24. That's the y intercept, representing a fixed fee for every rental.