Costco sells paperback books in their retail stores and wants to examine the relationship between the prices and sales. The price of a particular novel was adjusted each week and the weekly sales are in the following table. Management would like to use a simple linear regression model that uses prices to predict sales. 
The coefficient of determination for this sample is equal to ________.
Definitions:
Availability Heuristic
A cognitive shortcut based on the first examples that spring to mind when considering a particular topic, idea, strategy, or choice.
Estimated Probability
A statistical measure expressing the likelihood of a specific event occurring based on current evidence or past occurrences.
Instances
Specific examples or occurrences of a particular event, situation, or phenomenon.
Subjective Utility
An individual's perceived value or satisfaction obtained from consuming goods or services.
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