To avoid extra checked-bag fees, airline travelers often pack as much as they can into their suitcase. Finding a rolling suitcase that is durable, has good capacity, and is easy to pull can be difficult. The following table shows the results of tests conducted by Consumer Reports for 10 rolling suitcases; higher scores indicate better overall test results (Consumer Reports website, October 2008).

a. Develop a scatter diagram with price as the independent variable.
b. What does the scatter diagram developed in part (a) indicate about the relationship between the two variables?
c. Use the least squares method to develop the estimated regression equation.
d. Provide an interpretation for the slope of the estimated regression equation.
e. The Eagle Creek Hovercraft suitcase has a price of $225. Predict the score for this suitcase using the estimated regression equation developed in part (c).

Price ($) 325 350 67 120 85 180 360 156 595 400 Brand Score 72 74 Briggs & Riley Hartman Heys Kenneth Cole Reaction Liz Claiborm Samsonite Titan TravelPro Tumi Victorinox 57 67 87