Fuel Usage. The slope can be used to represent the average rate of change, or how much one quantity changes, on average, relative to the change in another quantity. An example of a slope that changes in real-life involves units of measure such as beats per minute or kilowatts per hour.

Over a 45-day period, the amount of propane in a tank that stores propane for heating a home decrease from 500 gallons to 344 gallons.

1. Use a graph or the slope formula to show the average rate of change in the amount of propane used over the 45-day period.

2. Show all work.

3. Explain what your solution represents in the context of the situation.