TABLE 13-1
A manager of a product sales group believes the number of sales made by an employee (Y) depends on how many years that employee has been with the company (X1) and how he/she scored on a business aptitude test (X2) . A random sample of eight employees provides the following: 
-Referring to Table 13-1, for these data, what is the estimated coefficient for the variable representing years an employee has been with the company, b₁?
Definitions:
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The favorable aspects or benefits associated with a situation, decision, or action.
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