Isabel's Furniture is a family business that has been selling to retail customers in the Pasadena area for many years. The company advertises on radio, TV, and the Internet. The owner would like to review the relationship between sales and the amount spent on advertising. Below is information on sales and advertising expenses for the last four months.
Month
Advertising Expense ($ million)
Sales Revenue ($ million)
July
2
7
August
1
3
Sept.
8
October
4
10
Determine the correlation coefficient. Leave your answer in 3 decimal places
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