Why is the demand curve downward sloping?
Extension
an increase in quantity demanded as a result of a decrease in price
- a movement down the demand curve
Contraction
a decrease in quantity demanded as a result of an increase in price
- a movement up the demand curve
A shift in the demand curve
How demand responds to a change in a non-price factor
Joint Demand
When two goods are compliments and need to be brought together
Competitive demand
When two goods are substitutes and both have the same function
Composite demand
When goods have multiple uses and can be used for many purposes
Effective demand
when consumers are willing and able to buy the good or service
Shifts of the demand curve