A rock is dropped from the top of a 2000-foot building. After 1 second, the rock is traveling 32 feet per second. After 3 seconds, the rock is traveling 96 feet per second. Let y be the rate of descent and x be the number of seconds since the rock was dropped.
a. Write a linear equation that relates time x to rate y. [Hint: Use the ordered pairs (1,32) and (3,96).]
