The chart below contains a portion of the fuel consumption information for a 2002 Toyota Echo. The first row is the cumulative number of gallons of gasoline used and the second row is the odometer reading when the gas tank was refilled.
[table — see PDF]
Find the least squares line for this data. Is it a good fit? What does the slope of the line represent? Do you and your classmates believe this model would have held for ten years had the car not crashed on the Turnpike a few years ago?