Real-World Examples of Demand and Supply Curves in Action

📚 Quick Study Guide

• 🍎 Demand: The quantity of a good or service that consumers are willing and able to purchase at a given price and time.
• 🛒 Supply: The quantity of a good or service that producers are willing and able to offer for sale at a given price and time.
• ⚖️ Equilibrium: The point where the supply and demand curves intersect, representing the market-clearing price and quantity.
• 📈 Law of Demand: As price increases, quantity demanded decreases (inverse relationship).
• 📉 Law of Supply: As price increases, quantity supplied increases (direct relationship).
• ✏️ Shifts in Demand: Changes in consumer income, tastes, expectations, or the price of related goods.
• 🏭 Shifts in Supply: Changes in input costs, technology, expectations, or the number of sellers.
• ➕ Surplus: When quantity supplied exceeds quantity demanded.
• ➖ Shortage: When quantity demanded exceeds quantity supplied.

Practice Quiz

1. What happens to the demand curve for gasoline if the price of cars increases significantly?
   1. It shifts to the right.
   2. It shifts to the left.
   3. It remains unchanged.
   4. It becomes vertical.
2. A local coffee shop increases the price of its lattes. What economic principle is directly demonstrated?
   1. Law of Demand
   2. Law of Supply
   3. Equilibrium
   4. Price Ceiling
3. Suppose a new technology dramatically lowers the cost of producing smartphones. What is the likely effect on the supply curve for smartphones?
   1. It shifts to the left.
   2. It shifts to the right.
   3. It remains unchanged.
   4. It becomes perfectly inelastic.
4. During the holiday season, the demand for toys increases significantly. What is the most likely outcome?
   1. A decrease in the price of toys.
   2. A surplus of toys.
   3. An increase in the price of toys.
   4. No change in the market.
5. If a government imposes a price ceiling below the equilibrium price for rental apartments, what is the likely result?
   1. A surplus of rental apartments.
   2. A shortage of rental apartments.
   3. The market will reach a new equilibrium at the ceiling price.
   4. No change in the market.
6. What happens to the supply curve of wheat if the price of fertilizer (an input) increases?
   1. It shifts to the right.
   2. It shifts to the left.
   3. It remains unchanged.
   4. It becomes perfectly elastic.
7. If consumer income increases and pizza is a normal good, what happens to the demand curve for pizza?
   1. It shifts to the left.
   2. It shifts to the right.
   3. It remains unchanged.
   4. The supply curve shifts to the left.