If product y is an inferior good, a decrease in consumer incomes will rev:
a. make buyers want to buy less of product y.
b. shift the demand curve for product y to the right.
c. shift the demand curve for product y to the left.
d. not affect the sales of product y.

Option (B) is correct.

Explanation:

Inferior good is a good whose demand is inversely related with the consumers income. This means that if there is an increase in the income of the consumer then as a result demand for normal good increases but demand for inferior goods decreases.

On the other hand, if there is a decrease in the income of the consumer then as a result demand for normal good decreases but demand for inferior goods increases.

Hence, decrease in consumer incomes will increase the demand of product Y and the demand curve for product Y to the right.  

answer; vertical marketing system;