10. Bergans of Norway has been making outdoor gear since 1908. The following data show the temperature rating (F°) and the price ($) for 11 models of sleeping bags produced by Bergans

(Backpacker 2006 Gear Guide).

a. Develop a scatter diagram for these data with temperature rating (F°) as the independent variable.

b. What does the scatter diagram developed in part

(a) indicate about the relationship between temperature rating (F°) and price?

c. Use the least squares method to develop the estimated regression equation.

d. Predict the price for a sleeping bag with a temperature rating (F°) of 20.