A regional coffee chain wants to understand whether the week…

A regional coffee chain wants to understand whether the weekly number of promotional emails sent(Variable X) is related to the average daily foot‑traffic in its flagship store (Variable Y). Over the past 8 weeks the marketing team recorded the data shown below. WEEK PROMOTIONAL EMAILS SENT (X) AVG. DAILY FOOT‑TRAFFIC (CUSTOMERS) (Y) 1 12 820 2 9 745 3 15 910 4 11 790 5 13 845 6 8 720 7 14 880 8 10 770 Task Calculate the sample covariance between the number of promotional emails and the average daily foot‑traffic (report you answer to the nearest whole number, be sure to include a negative sign if appropriate).