A cave diver descends 129 feet in 9 minutes at a constant rate. Express the rate of the cave divers change in depth as a rational number in the form of a quotient in integers.

Question

A) 129ft/9min

B) 9ft/-129min

C) -129ft/9min

D) -129ft/-9min

Answer 1

Since the cave diver is descending the depth is going to be negative. The time is not negative.

C. -129 ft/(9 min)