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 
-Estimate the linear regression of y on x.
Definitions:
Average Total Cost
The total cost divided by the quantity produced, representing the cost of producing each unit of output.
Long Run
A period in which all factors of production and costs are variable, allowing full adjustment to changes.
Demand Equals
A state in a market where the quantity of a good or service desired by buyers is equal to the quantity supplied by sellers, resulting in market equilibrium.
Marginal Cost
The added expenditure resulting from creating an additional product or service unit.
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