1. Use regression analysis to develop a straight-line approximation of the relationship between the two variables. Use POM-QM or MS-Excel template file posted in Moodle.
2. Use the equation developed in part (a) to forecast sales for an advertising expenditure of $8000.
3. Interpret the values of r and r² obtained from the analysis.

20 points) Denny's collected the following data on the relationship between advertising and sales at a sample of five restaurants.

Advertising Expenditure ($)	Sales ($)
1000	19000
4000	44000
6000	40000
10000	52000
14000	53000