Other things being equal, larger automobile engines are less fuel-efficient. You are planning an experiment to study the effect of engine size (in liters) on the fuel efficiency (in miles per gallon) of sport utility vehicles. In this study; A-Gas mileage is a response variable, and you expect to find a negative association
B-Gas mileage is a response variable, and you expect to find a positive association
C-Gas mileage is an explanatory variable, and you expect to find a strong negative association
D-Gas mileage is an explanatory variable, and you expect to find a strong positive association
E-Gas mileage is an explanator variable, and you expect to find very little association