A regional manager at Acme Markets would like to develop a model to predict weekly sales of pet food based on the shelf space. The following table shows the results of data collected from nine randomly selected stores and can also be found in the Excel file Acme. xlsx.

a. Calculate the sample covariance.

b. Calculate the sample correlation coefficient.

c. Describe the relationship between x and y.

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Shelf Space Sales (Feet ($100) Shelf Space Sales Feet($100) 12 18