High School Economics Quiz: Applying Supply and Demand Concepts

📚 Quick Study Guide: Supply & Demand Essentials

• 🎯 Demand: The quantity of a good or service that consumers are willing and able to purchase at various prices during a given period.
• 📉 Law of Demand: States that, all else being equal (ceteris paribus), as the price of a good or service increases, the quantity demanded decreases, and vice versa. This creates a downward-sloping demand curve.
• 📈 Supply: The quantity of a good or service that producers are willing and able to offer for sale at various prices during a given period.
• ⬆️ Law of Supply: States that, ceteris paribus, as the price of a good or service increases, the quantity supplied increases, and vice versa. This creates an upward-sloping supply curve.
• ⚖️ Market Equilibrium: The point where the quantity demanded equals the quantity supplied ($Q_D = Q_S$). At this price, there is no surplus or shortage in the market.
• surplus Surplus: Occurs when the quantity supplied is greater than the quantity demanded ($Q_S > Q_D$), typically at a price above equilibrium.
• 🔻 Shortage: Occurs when the quantity demanded is greater than the quantity supplied ($Q_D > Q_S$), typically at a price below equilibrium.
• ➡️ Demand Shifters (Determinants): Factors that cause the entire demand curve to shift left or right. These include: Tastes and preferences, Income (normal vs. inferior goods), Related goods' prices (substitutes vs. complements), Expectations (future prices/income), and Size of the market (number of buyers). (Acronym: TIRES)
• ⬅️ Supply Shifters (Determinants): Factors that cause the entire supply curve to shift left or right. These include: Prices of inputs/resources, Technology, Taxes and subsidies, Expectations (future prices), and Number of sellers. (Acronym: PTTEN)

🧠 Practice Quiz: Applying Supply and Demand

1. Which of the following would most likely cause the demand curve for coffee to shift to the right?

1. A decrease in the price of coffee beans.
2. A new scientific study showing health benefits of daily coffee consumption.
3. An increase in the price of tea (a substitute good).
4. Both B and C.

2. According to the Law of Supply, if the price of a popular video game increases, what will producers most likely do?

1. Decrease the quantity of video games supplied.
2. Increase the quantity of video games supplied.
3. Shift the entire supply curve to the left.
4. Shift the entire supply curve to the right.

3. If the market price for a product is currently below the equilibrium price, what situation exists in the market?

1. A surplus, causing prices to fall.
2. A shortage, causing prices to rise.
3. Market equilibrium, with no pressure for price changes.
4. A surplus, causing prices to rise.

4. An improvement in technology for producing smartphones would most likely lead to:

1. A decrease in the supply of smartphones.
2. An increase in the demand for smartphones.
3. An increase in the supply of smartphones.
4. A decrease in the demand for smartphones.

5. If the income of consumers increases, and a good is considered a 'normal good', what will happen to the demand for that good?

1. The demand curve will shift to the left.
2. The quantity demanded will decrease.
3. The demand curve will shift to the right.
4. There will be no change in demand.

6. Which of the following is NOT a determinant (shifter) of demand?

1. Consumer tastes and preferences.
2. The price of related goods.
3. The cost of resources to produce the good.
4. Consumer expectations about future prices.

7. Suppose the government imposes a new tax on the production of sugary drinks. What is the most likely immediate effect on the market for sugary drinks?

1. The demand curve will shift to the right.
2. The supply curve will shift to the right.
3. The demand curve will shift to the left.
4. The supply curve will shift to the left.