Real-World Examples of Price Elasticity of Demand (Elastic & Inelastic)

📚 Quick Study Guide

• 📈 Price Elasticity of Demand (PED): Measures how much the quantity demanded of a good changes when its price changes.
• 📐 Formula: $PED = \frac{\% \, Change \, in \, Quantity \, Demanded}{\% \, Change \, in \, Price}$
• Elastic Demand: PED > 1 (Quantity demanded is very responsive to price changes).
• Inelastic Demand: PED < 1 (Quantity demanded is not very responsive to price changes).
• Unit Elastic Demand: PED = 1 (Percentage change in quantity demanded equals the percentage change in price).
• Perfectly Elastic Demand: PED = ∞ (Demand drops to zero with any price increase).
• Perfectly Inelastic Demand: PED = 0 (Quantity demanded doesn't change regardless of price).
• Necessities (e.g., medicine) tend to have inelastic demand.
• Luxuries (e.g., sports cars) tend to have elastic demand.

🧠 Practice Quiz

1. Question 1: Which of the following goods is most likely to have inelastic demand?
   1. A) Designer Handbags
   2. B) Gasoline
   3. C) Movie Tickets
   4. D) Restaurant Meals
2. Question 2: If a 10% increase in the price of coffee leads to a 2% decrease in the quantity demanded, what is the price elasticity of demand for coffee?
   1. A) 0.2
   2. B) 2
   3. C) 5
   4. D) 10
3. Question 3: A perfectly inelastic demand curve is represented graphically as:
   1. A) A horizontal line
   2. B) A vertical line
   3. C) An upward-sloping line
   4. D) A downward-sloping line
4. Question 4: Which of the following factors tends to make demand more elastic?
   1. A) The good is a necessity
   2. B) There are few substitutes available
   3. C) The good represents a small portion of the consumer's budget
   4. D) The good has many close substitutes
5. Question 5: If the price elasticity of demand for a product is 1.5, and the company decreases the price by 5%, what will be the approximate percentage change in quantity demanded?
   1. A) Decrease by 3.33%
   2. B) Increase by 3.33%
   3. C) Decrease by 7.5%
   4. D) Increase by 7.5%
6. Question 6: A local bakery finds that when it raises the price of its bread by 5%, its sales fall by 8%. What type of demand does bread have in this scenario?
   1. A) Perfectly Inelastic
   2. B) Inelastic
   3. C) Unit Elastic
   4. D) Elastic
7. Question 7: Which of the following products likely has the most elastic demand?
   1. A) Prescription Medication
   2. B) Salt
   3. C) Airline Tickets for a Specific Flight
   4. D) Electricity