When a good is inferior, an increase in a consumer’s income decreases the consumer’s consumption of that good. Here, mac and cheese is an inferior good, while steak is a normal good. When the consumer’s income increases, shifting the budget constraint outward from BC₁ to BC₂, she consumes less mac and cheese and more steak at the optimal consumption bundle. From initial optimal consumption bundle A to her new optimal consumption bundle B, the quantity of mac and cheese consumed decreases from Q_m to Q′_m while her consumption of the normal good steak increases from Q_s to Q_s′.