The marketing manager of a large supermarket chain would like to determine the effect of shelf space on the sales of per food. Petfood.xls contains the data from a random sample of 12 equal-sized stores. Set the independent (explanatory) variable (X) shelf space for pet food (in feet), and the dependent (response) variable Y) the average weekly sales (in hundreds of dollars). If the square footage is increased by one foot, how much do you predict the sales to increase per week?
Choose one answer.
$1.45
$0.074 (7.4 cents)
$7.40