142k views
24 votes
Mikayla went on a road trip. Two hours into the road trip, she had 15 gallons of gas in her tank. Seven hours into her trip, she had 3 gallons of gas in her tank. Find the rate of change

User Lifjoy
by
8.0k points

1 Answer

8 votes

Answer: -2.4 gallons per hour

Explanation:

Think of this as a linear equation where the rate of change is m.

m = (Y₂ - Y₁) / (X₂ - X₁)

Assume the points are: (2, 15) (7, 3)

m = (3 - 15) / (7 - 2)

= (-12) / 5

= - 2.4 gallons per hour

Gas is reducing by 2.4 gallons per hour.

User Sueann
by
8.7k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.