Question

A parachutist descends 40 feet in 4 seconds. What integer represents the​ parachutist's change in height in feet per​ second?

Answer 1

-10

Explanation:

You want to know the rate of descent in feet per second represented by a descent of 40 feet in 4 seconds.

Rate

The rate is the amount divided by the time:

-40 ft/(4 s) = -10 ft/s

The relevant integer is -10.