Comcast’s customer service department asks its customers to rate their over the phone service on a scale of 1–20 immediately after their service has been completed. The company then matches each customer’s rating with the number of minutes the person waited on hold. The following table shows the ratings and number of minutes on hold for 10 randomly selected customers and can also be found in the Excel file hold.xlsx.

a. Calculate the sample covariance.

b. Calculate the sample correlation coefficient.

c. Describe the relationship between x and y.

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Minutes Rating Minutes Rating 15 13 18 10 14 16 14 20 14 10