A normal good
(i) There is a positive relationship between income and demand of normal goods.
(ii) Demand curve shifts rightwards with the rise in income of consumer and demand curve shifts leftwards with the fall in income of consumer.
An inferior good
(i) There is negative relationship between of consumer income of consumer and demand of inferior goods.
(ii) Demand curve shifts leftwards with the of rise in income of consumer and demand curve shifts rightwards with the fall in income of consumer.