A hot-air balloon at 1120 feet descends at a rate of 80 feet per minute. Let y represent the height of the balloon and let x represent the number of minutes the balloon descends. (a) Write an equation that relates the height of the hot-air balloon and the number of minutes it descends.

(b) What is the y-intercept of the graph?
(x, y) =

What does the y-intercept represent in the context of the problem?

- the distance the balloon traveled as it descends.
- initial height of the hot-air balloon.
- number of minutes it takes for the balloon to reach the ground.
- final height of the hot-air balloon.
- number of minutes the balloon began descending.