# Example 5

- Author:
- Walch Education

A Boeing 747 starts out a long flight with about 57,260 gallons of fuel in its tank. The airplane uses an average of 5 gallons of fuel per mile. Write an equation that models the amount of fuel remaining in the tank over the course of the flight. Graph the equation using a graphing calculator, and then draw the resulting graph on graph paper.

- Read the problem statement and then reread the problem, determining the known quantities.
- Identify the slope and the
*y*-intercept. - Graph the equation on your calculator.
- Draw the resulting graph on graph paper.