THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
For a sample of 20 monthly observations a financial analyst wants to regress the percentage rate of return (y)of the common stock of a corporation on the percentage rate of return (x)of the Standard and Poor's 500 Index.The following summary statistics are available: 
, 
, 
,and 
-Interpret the slope of the sample regression line.
Definitions:
Expenses
Costs incurred in the process of earning revenue, such as rent, utilities, and salaries.
Stockholders' Equity
The remaining interest in a corporation's assets after all liabilities are subtracted, which signifies ownership.
Accounts Receivable
Accounts receivable represents money owed to a business by its customers for goods or services delivered but not yet paid for.
Business Activities
Various actions undertaken by a company to operate and manage its business, including operating, investing, and financing activities.
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