The director of graduate admissions is analyzing the relationship between scores in the Graduate Record Examination (GRE) and student performance in graduate school, as measured by a student's GPA. The table below shows a sample of 10 students. 
(See the Excel Data File.) The covariance is ________.
Definitions:
Stock Price
The cost of purchasing a share of a company's stock on the open market.
Constant Growth Rate
A stable rate at which a company's dividends or earnings are expected to grow over time, often used in valuation models.
Required Return
The lowest profit an investor anticipates making from an investment in a specific asset, considering its associated risk.
Required Rate of Return
A rephrased definition; the minimum percentage of return investors demand from an investment to compensate for its risk.
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