Barbara is deciding between banquet chefs and cece’s catering to cater an awards banquet. barbara needs to choose the company that costs less, but she does not yet know how many guests will be attending. how can barbara decide once she does know the number of guests? give the range of guests for which barbara should choose banquet chefs and the range of guests for which she should choose cece’s catering. use mathematics to justify your reasoning.

Aconcession manager at yankee stadium wants to know how temperature affects beer sales. she took a sample of 10 games and recorded the number of beers sold and the temperature in the middle of the game. temperature 80 68 78 79 87 74 86 92 77 84 number of beers 20533 1439 13829 21286 30985 17187 30240 87596 9610 28742 a. draw a scatter plot of the data. b. the manager estimates the regression equation to be: numberofbeers = −100, 678 + 1, 513 ∗ temperature draw this on your scatter plot. c. for one of the estimated points, indicate the residual with ei . d. for that same point, indicate what part of the variation is explained by the model with ˆyi − y¯.