A company rents gym equipment for a fixed amount plus a fee based on the number of days for which the equipment is rented. The table shows the total charges, y, in dollars, of renting gym equipment for x number of days: Gym Equipment Rentals Number of days (x) Total Charges in dollars (y) 0 25 1 40 2 55 What is the fixed amount charged? $2 $15 $25 $40