GIVES BRAINLIEST!
Look at image above for question!

Answer:
C
Step-by-step explanation:
its gaining height at 20 feet a minute.
1 minute=20 feet.
2 minute=40 feet.
3 minute=60 feet.
4 minute=80 feet
5 minute=100 feet
6 minute=120 feet
7 minute=140 feet