Final answer:
O will necessarily shift to the left. The demand curve for a normal good will shift to the right if consumer incomes increase, due to the positive nature of income elasticity of demand for normal goods.
Step-by-step explanation:
If consumer incomes increase, the market demand curve for a normal good will necessarily shift to the right. This shift is due to the fact that normal goods have a positive income elasticity of demand, meaning that as income increases, the demand for these goods also increases. Conversely, for an inferior good, which has a negative income elasticity of demand, a rise in income would typically lead to a shift of the demand curve to the left. The extent of these shifts in either case depends on the magnitude of the income elasticity of demand for the particular good.A higher level of income causes the market demand curve for a normal good to shift to the right. This is because when consumers have more income, they are able to afford more of the normal good, leading to an increase in demand.
The extent to which the demand curve shifts depends on the income elasticity of demand, which measures the responsiveness of quantity demanded to changes in income.If the income elasticity of demand for the normal good is positive, a higher level of income will lead to a larger shift in the demand curve to the right. However, if the income elasticity of demand is negative, indicating that the good is an inferior good, the demand curve will shift to the left when consumer incomes increase.