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, form, and strength.
a) Apples: weight in grams, weight in ounces
b) Apples: circumference (inches), weight (ounces)
c) College freshmen: shoe size, grade point average
d) Gasoline: number of miles you drove since filling up, gallons remaining in your tank