AP Microeconomics: Determinants of Demand Quiz & Questions

📚 Quick Study Guide: Determinants of Demand

• 📈 Definition of Demand: Demand refers to the quantity of a good or service that consumers are willing and able to purchase at various prices during a given period. It's not just wanting something; you need the purchasing power too!
• 📉 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.
• 🔑 Determinants (Shifters) of Demand: These are non-price factors that cause the entire demand curve to shift either to the left (decrease in demand) or to the right (increase in demand). Understanding these is crucial!
• 💰 1. Income:
  • ⬆️ Normal Goods: As income increases, demand increases. (e.g., steak, designer clothes).
  • ⬇️ Inferior Goods: As income increases, demand decreases. (e.g., ramen noodles, public transportation when a car is affordable).
• 🤝 2. Tastes and Preferences: If consumers' preferences for a good increase (e.g., due to advertising, new trends), demand increases. If preferences decrease, demand decreases.
• 💲 3. Prices of Related Goods:
  • 🔄 Substitutes: Goods used in place of one another. If the price of a substitute increases, demand for the original good increases. (e.g., if coffee prices rise, tea demand increases).
  • 🔗 Complements: Goods consumed together. If the price of a complement increases, demand for the original good decreases. (e.g., if car prices rise, demand for tires decreases).
• 🔢 4. Number of Consumers (Market Size): An increase in the number of potential buyers in the market leads to an increase in demand, and vice versa. (e.g., population growth).
• 🔮 5. Consumer Expectations:
  • 📈 Future Prices: If consumers expect prices to rise in the future, current demand increases.
  • 💼 Future Income: If consumers expect their income to increase, current demand for normal goods may increase.
• 💡 Key Distinction: A 'change in demand' (shift of the entire curve) is caused by a change in one of these determinants. A 'change in quantity demanded' (movement along the curve) is caused only by a change in the good's own price.

📝 Practice Quiz

Choose the best answer for each question.

1. Which of the following would cause the demand curve for a normal good to shift to the right?
   A. An increase in the price of the good itself.
   B. A decrease in consumer income.
   C. A decrease in the price of a complementary good.
   D. A decrease in the number of buyers.
2. If consumers expect the price of gasoline to significantly increase next week, what will likely happen to the demand for gasoline today?
   A. It will decrease.
   B. It will increase.
   C. It will remain unchanged.
   D. The quantity demanded will decrease.
3. Which of the following is an example of an inferior good?
   A. A luxury car, where demand increases as income increases.
   B. Generic brand cereal, where demand decreases as income increases.
   C. Organic vegetables, where demand increases as income increases.
   D. High-speed internet service, where demand increases as income increases.
4. The demand for smartwatches has increased significantly due to a new fitness craze. Which determinant of demand is primarily responsible for this shift?
   A. Consumer expectations.
   B. Price of related goods.
   C. Tastes and preferences.
   D. Number of consumers.
5. If the price of coffee rises, what is the most likely effect on the demand for tea, assuming they are substitutes?
   A. The demand for tea will decrease.
   B. The demand for tea will increase.
   C. The quantity demanded of tea will decrease.
   D. The quantity demanded of tea will increase.
6. A new housing development brings 500 new families into a town. What will be the immediate effect on the demand for groceries in that town?
   A. A decrease in demand.
   B. An increase in demand.
   C. A movement along the demand curve.
   D. No change in demand.
7. Which of the following statements correctly distinguishes between a change in demand and a change in quantity demanded?
   A. A change in demand is caused by a change in the good's own price, while a change in quantity demanded is caused by a determinant.
   B. A change in demand is a shift of the entire curve, while a change in quantity demanded is a movement along the curve.
   C. Both a change in demand and a change in quantity demanded refer to a shift of the entire curve.
   D. Both a change in demand and a change in quantity demanded refer to a movement along the curve.