Difference demand and quantity demanded

A change in quantity demanded represents a movement along the current demandcurve, while a change in demand represents a shift in the entire demand curve. By understanding this difference, a producer can better respond to market changes.

Demand is defined as the willingness of buyer and his affordability to pay the price for the economic good or service whereas Quantity Demanded represents exact quantity (how much) of a good or service is demanded by consumers at a particular price.

Reasons for Demand is Factors other than the price whereas for Quantity demanded it is price itself.

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