Which function can be used to model the graphed geometric sequence

Acable car begins its trip by moving up a hill. as it moves up, it gains elevation at a constant rate of 50 feet/minute until it reaches the peak at 2,000 feet. then, as the car moves down to the hill’s base, its elevation drops at the same rate.

What is the slope of the line shown below?

What is the t intercept of the line given by the equation below y= -10x + 14