Bergans of Norway, an international company, has been making outdoor gears since 1908. The following data show the temperature rating (F°) and the price ($) for 11 models of sleeping bags produced by Bergans (Backpacker 2006 Gear Guide) Sleeping bags Model Temperature Rating (F°) Price ($) Ranger 3-Seasons 12 319 Ranger Spring 24 289 Ranger Winter 3 389 Rondane 3-Seasons 13 239 Rondane Summer 38 149 Rondane Winter 4 289 Senja Ice 5 359 Senja Snow 15 259 Senja Zero 25 229 Super Light 45 129 Tight & Light 25 199 Applying the least squares method, we obtain an estimated regression equation which shows the relationship between temperature rating and price. The equation is y = 359.27 − 5.2772 × x with R2 = .8043 and the standard error s = 37.94$.

a) Predict the price for a sleeping bag with a temperature rating (F°) of 19.