Final answer:
An increased consumer income typically leads to a higher demand for normal goods like lobster. The increased demand represents a rightward shift in the demand curve for these goods, though the extent of the shift depends on personal preferences and spending habits.
Step-by-step explanation:
An increase in consumer income, assuming other factors remain constant, would result in an increased demand for normal goods such as lobster. This outcome is consistent with the basic principles of demand and supply as well as income elasticity of demand. As incomes rise, consumers typically have more disposable income, which they allocate to purchasing more normal goods because these goods provide greater satisfaction. Conversely, inferior goods see a decrease in demand as income increases, as consumers can afford better alternatives.
The case of lobster as a normal good means that, assuming lobster is a preferred item, its demand curve will shift to the right, indicating increased quantities demanded at every price level. The extent of this increase in demand may vary among different individuals, influenced by their tastes and preferences, but the general trend will see a growth in lobster sales. Lastly, as the consumer's income increases further, the proportion of income spent on lobster (average propensity to consume) may decline, while the actual quantity consumed increases.