Ajet plane is descending at a rate of 200 feet per second from an altitude of 36000 feet let x represent the number of seconds of descent and y represent the jet plane’s altitude in feet. which expression represents this situation? a. y = 200x - 36000 b. y = 200x + 36000 c. y = -200x - 36000 d. y = -200x + 36000