Question

I dont understand this question

Answer 1

The problem tells us that in 5 seconds, the person descended 65 feet.

Therefore, we can calculate how many feet the person descended in one second:
$x = 65 \div 5 \\ x = 13$

They descended 13 feet per second.
Because their altitude is decreasing, The unit rate would be negative: -13 feet per second

Answer 2

A parachutist descends 65 feet in 5 seconds.

To find the unit rate, you need to find how many feet the parachutist descends per second(for 1 second)

You can divide 65 by 5 to get the # of feet per second.

65/5 = 13

13 feet per second