7. a) Model this situation with a linear system: To rent a car, a person is charged a daily rate and a fee for each kilometre driven. When Chena rented a
car for 15 days and drove 800 km, the charge was $715.00. When she rented the same car for 25 days and
drove 2250 km, the charge was $1512.50.
b) Determine the daily rate and the fee for each kilometre driven. Verify the solution.