In moving along a demand curve for good x, which of the following is held constant?

• A. The income of consumers
• B. The supply of good x
• C. The price of good x
• D. The quantity demanded of good x

Answer: (A)

Verified step by step guidance

1. Understand that a demand curve shows the relationship between the price of a good and the quantity demanded, holding other factors constant.
2. Recall that when moving along a demand curve, the price of the good changes, which causes a change in the quantity demanded.
3. Identify that factors other than the price of the good, such as consumer income, prices of related goods, tastes, and expectations, are held constant when moving along the demand curve.
4. Recognize that the supply of the good is not relevant to the demand curve itself; it affects the supply curve instead.
5. Conclude that the correct factor held constant when moving along a demand curve is the income of consumers, as changes in income would shift the demand curve rather than move along it.