Using the data and results from Problem 2, do the following:

(a) Find the least-squares regression line treating fat content as the explanatory variable.
(b) Draw the least-squares regression line on the scatter diagram.
(c) Interpret the slope and y-intercept, if appropriate.
(d) Predict the number of calories in a sandwich that has 30 grams of fat.
(e) A cheeseburger from Sonic has 700 calories and 42 grams of fat. Is the number of calories for this sandwich above or below average among all sandwiches with 42 grams?

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Sandwich (Restaurant) Quarter-pound Single with Cheese (Wendy's) Whataburger (Whataburger) Cheeseburger (In-n-Out) Big Mac (McDonald's) Quarter-pounder with cheese (McDonald's) Whopper with cheese (Burger King) Jumbo Jack (Jack in the Box) Double Steakburger with cheese (Steak 'n Shake) Fat Content (g) Calories 20 39 27 29 430 750 480 540 26 510 47 760 35 690 38 632