A balloon is released from the top of a building. The graph shows the height of the balloon over time . What does the slope and y-intercept reveal about the situation ?

A. The starts at a height of 500 ft and rises at a rate of 100 ft.

B. The balloon starts at a height if 0.5 ft and rises at a rate of 10 ft.

C . The gallon starts at a height of 100 ft and rises at a rate of 500 ft .