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a change in demand is a movement along the demand curve, and a change in quantity demanded is a shift in the demand curve. 3 people found this useful. Edit. Share to: 1  The Job Outlook and Salary Trends for a Cosmetologist Cosmetology is a field with many different opportunities for its professionals.
The following article provides an overview of supply and demand in general and explains the differences between demand and supply curves. Demand Curve. Demand is defined as the desire to purchase goods and services backed by the ability and willingness to pay a price. The law of demand is an important concept in economics that looks at the relationship between the price and quantity demanded.