An alien ship 42,000 ft above the Earth is descending at 2,000 ft/sec

A. Assuming the rate of descent is constant, how long will it be before the ship is on the ground?

B. Sketch a graph of y = -2000x + 42000 (Y: 7000,1400,21000,28000,35000,42000) (X: 3,6,9,12,15,18,21

C. In the context of the alien ship, what do the slope and y- intercept of the line in part b represent?