A snowboarder starts at the top of a mountain that is 2,500 feet above sea level. The
snowboarder then descends at a constant rate of 650 feet per minute. Which equation
represents this situation, where y represents the current altitude of the snowboarder, in
feet, and x represents the number of minutes that have passed?
a. y = 2,500x - 650
b. y = 650x + 2,500
C. y = -650x - 2,500
d. y = – 650x + 2,500