Pls help me for brainetest

Match each function with its rate of growth or decay

Part a: sam rented a boat at $225 for 2 days. if he rents the same boat for 5 days, he has to pay a total rent of $480. write an equation in the standard form to represent the total rent (y) that sam has to pay for renting the boat for x days. (4 points)

What is the measure of ac? 5 units 13 units 26 units 39 units 3x- 2b 6x + 9