Dixie Showtime Movie Theaters, Inc., owns and operates a chain of cinemas in several markets in the southern U.S. The owners would like to estimate weekly gross revenue as a function of advertising expenditures. Data for a sample of eight markets for a recent week follow.

Market	Weekly Gross Revenue ($100s)	Television Advertising ($100s)	Newspaper Advertising ($100s)
Mobile	101.3		4.9	1.4
Shreveport	52.9		3.1	3.2
Jackson	75.8		4.2	1.5
Birmingham	127.2		4.5	4.3
Little Rock	137.8		3.6	4
Biloxi	102.4		3.5	2.3
New Orleans	236.8		5	8.4
Baton Rouge	220.6		6.8	5.9

(a)	Use the data to develop an estimated regression with the amount of television advertising as the independent variable.
Letxrepresent the amount of television advertising.
If required, round your answers to four decimal places. For subtractive or negative numbers use a minus sign even if there is a + sign before the blank. (Example: -300)
=+x
(b)	How much of the variation in the sample values of weekly gross revenue does the model in part (a) explain?
If required, round your answer to two decimal places.
%
(c)	Use the data to develop an estimated regression equation with both television advertising and newspaper advertising as the independent variables.
Letx1represent the amount of television advertising.
Letx2represent the amount of newspaper advertising.
If required, round your answers to four decimal places. For subtractive or negative numbers use a minus sign even if there is a + sign before the blank. (Example: -300)
=+x1+x2
(d)	How much of the variation in the sample values of weekly gross revenue does the model in part (c) explain?
If required, round your answer to two decimal places.
%