An airline studying fuel usage by a certain type of aircraft obtains data on 100 flights...

An airline studying fuel usage by a certain type of aircraft obtains data on 100 flights. The air mileage x in hundreds of miles and the actual fuel use y in gallons are recorded. Statistix output follows and a plot is shown.

a. Locate the regression equation.

b. What are the sample correlation coefficient and coefficient of determination? Interpret these numbers.

c. Is there any point in testing