You Can Visit the Official Website of Any Large Restaurant

Multiple Choice

You can visit the official website of any large restaurant chain to examine the nutritional data for menu items. For fast-food restaurants, many menu items are high in fat, so most of their calorie content comes from fat (rather than from carbohydrates or protein) . Here we investigate the relationship between the amount of fat in a menu item (in grams) and the number of calories. To predict the number of calories in a menu item given its fat content, we use the simple linear regression model calories =  +  (fat) , where the deviations are assumed to be independent and Normally distributed, with mean 0 and standard deviation . The explanatory variable in this study is:

A) number of calories.
B) fat content (grams of fat) .
C) the slope, .
D) 12.546.