Question: In order to determine whether or not the number of automobiles sold per day (Y) is related to price (X1 in thousands of dollars), and the number of advertising spots (X2), data were gathered for 7 days. Part of the regression results is shown below:

a) Write the least squares regression equation relating Y to X1 and X2.

b) If the company charges $20,080 for each car and uses 10 advertising soots, how many cars would you expect them to sell in a day?

c) Using a .05 level of significance, test to determine if the equation developed in part a represents a significant relationship between the independent variables and the dependent variable.

d) At 95% confidence, test to see if price is a significant variable

e) At 95Y confidence, test to see if the number of advertising spots is a significant variable.