LA- Contemporary Business Mathematics STRAIGHT LINE GRAPH 4. Two car rentals firms offer cars for rent in a small city. Sketchy Brothers hire their cars at $50 per day plus 20 cents per Km travelled, while Rent-A-Heap charge $70 per day plus 15 cents per km travelled. a. Write an equation for the cost $C, of hiring a car for the day from Sketchy Brothers if the car travels k Kilometres. b. Write an equation for the cost $C, of hiring a car for the day from Rent-A-Heap if the car travels k kilometres. c. Graph both equations on the same set of axes and estimate the intersection point of the 2 lines. d. Use an algebraic technique to find the coordinates of the intersection point, and explain the significance of this point. e. When is it cheaper to use Rent-A-Heap