A) Develop a simple regression model to predict the demand

a) Develop a simple regression model to predict the demand for snow blowers based on the number of advertising dollars spent. 

b) What percentage of the demand variation is explained by the level of advertising? 

c) Next year’s advertising budget is $2,600. What is the predicted demand for snow blowers? 

d) Develop a multiple regression model to predict the demand for snow blowers based on the advertising budget and the amount of snowfall. 

e) What is r-squared? Interpret r-squared. 

f) What is the predicted demand for snow blowers with an advertising budget of $2,600 and expected snowfall of 65 inches?