Suppose you were to collect data for each pair of variables. You want to make a scatterplot. Which variable would you use as the explanatory​ variable, and which as the response​ variable? Why? What would you expect to see in the​ scatterplot? Discuss the likely direction and form. ​a) T-shirts at a​ store: price​ each, number sold. ​b) Real​ estate: house​ price, house size​ (square footage). ​c)​ Economics: interest​ rates, number of mortgage applications. ​d)​ Employees: salary, years of experience.