A plane is starting a descent to prepare for landing. The plane's initial altitude was 25,500 feet. The table below shows the altitude (y) of the plane after each minute (x) of the descent. Minutes (x) Altitude (y) 1 24,525 2 23,550 3 22,575 4 21,600 After descending for 4 minutes, the pilot was contacted by an air traffic controller. The controller asked how long it would take the plane to descend to an altitude of 15,750 feet at the current rate of descent. How many minutes should the pilot tell the air traffic controller that it's going to take? A. 5 minutes B. 7 minutes C. 4 minutes D. 6 minutes