A skydiver with an open parachute descends at a constant speed. The altitude of the skydiver changes by -144 feet in 6 seconds

-24

Step-by-step explanation:

If you decend -144 feet in 6 seconds, by 10 to get what you descend in 60 seconds= -1440. Then divide -1440 by 60 to get -24 feet each second.

it's a proportional graph.

step-by-step explanation:

8 x 5 = 40         (and you have -8x and -5y)

x= absiss

y= orderly

so you have a proportional graph.