Mikaela has collected a few factors which can influence the daily sales of pies. These factors are: number of advertisements placed on the local TV channel, average temperature of the day, and price of the local barbecue sauce. The values that she has collected for these factors together with the daily sales for the last 10 days are presented in the following table. Suppose she is interested in whether or not sales daily depend upon the average temperature of the day. What variable should be independent and what should be the dependent variable? Why