Supply and Demand
Which of the following would cause the demand curve for a normal good to shift to the right?
A decrease in consumer income.
An increase in the price of a substitute good.
An increase in the price of the good itself.
A decrease in the price of a complementary good.
A decrease in the price of a good will cause which of the following?
An increase in demand.
A decrease in supply.
An increase in quantity demanded.
A decrease in quantity supplied.
According to the law of supply, what happens when the price of a good increases?
Quantity supplied decreases.
Quantity supplied increases.
Quantity supplied remains the same.
Demand decreases.
Due to a viral social media trend, more consumers want to buy a particular product. How is this represented in a supply and demand model?
A movement along the demand curve.
A shift of the supply curve.
A shift of the demand curve.
A movement along the supply curve.
Which of the following best describes the law of demand?
As price increases, quantity demanded increases.
As price decreases, quantity demanded decreases.
As price increases, quantity demanded decreases.
Price and quantity demanded are unrelated.
Suppose consumer income increases and the price of a complementary good decreases. What is the likely effect on the demand for the good in question?
Demand will increase.
Demand will decrease.
Demand will remain unchanged.
The effect on demand is indeterminate.
Given a supply and demand graph, what is the equilibrium price and quantity?
The price and quantity at the point where the curves are farthest apart.
The price and quantity at the intersection of the supply and demand curves.
The price and quantity at the highest point on the demand curve.
The price and quantity at the lowest point on the supply curve.

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Suppose the market for widgets is perfectly competitive. The demand and supply curves are given by the following equations, where is the price and is the quantity:
Demand: Supply:
What is the equilibrium price and quantity?
P = 20, Q = 60
P = 30, Q = 40
P = 40, Q = 20
P = 50, Q = 0
Which of the following would cause the supply curve for a good to shift to the left?
A decrease in input costs.
Technological advancement.
An increase in the number of sellers.
An increase in input costs.
Suppose the cost of raw materials increases and a new technology reduces production costs. What is the likely effect on the supply of the good?
Supply will increase.
Supply will decrease.
Supply will remain unchanged.
The effect on supply is indeterminate.