You are the manager of the supermarket on the ground floor of Holmes Building. You are wondering if there is a relation between the number of students attending class at Holmes Institute each day, and the amount of chocolate bars sold. That is, do you sell more chocolate bars when there are a lot of Holmes students around, and less when Holmes is quiet? If there is a relationship, you might want to keep less chocolate bars in stock when Holmes is closed over the upcoming holiday. With the help of the campus manager, you have compiled the following list covering 7 weeks: