Real-World Examples of Elastic & Inelastic Demand

📚 Quick Study Guide

• ⚖️ Elastic Demand: Demand changes significantly with price changes. (Luxury goods, non-essentials)
• 🚗 Inelastic Demand: Demand changes little with price changes. (Necessities like gasoline, medicine)
• ➕ Perfectly Elastic: Horizontal demand curve; any price increase results in zero demand.
• ➖ Perfectly Inelastic: Vertical demand curve; demand remains constant regardless of price.
• 📐 Formula for Price Elasticity of Demand (PED): $PED = \frac{\% \ Change \ in \ Quantity \ Demanded}{\% \ Change \ in \ Price}$
• 💡 PED > 1: Elastic; PED < 1: Inelastic; PED = 1: Unit Elastic.
• ⏱️ Time Horizon: Demand tends to become more elastic over longer time periods.

Practice Quiz

1. What is an example of a product with relatively elastic demand?
   1. A) Gasoline
   2. B) Life-saving medication
   3. C) Designer handbags
   4. D) Electricity
2. If the price of insulin increases by 20% and the quantity demanded decreases by only 1%, the demand for insulin is considered:
   1. A) Elastic
   2. B) Unit elastic
   3. C) Inelastic
   4. D) Perfectly elastic
3. Which of the following goods is most likely to have perfectly inelastic demand?
   1. A) A new car model
   2. B) Salt
   3. C) Concert tickets
   4. D) Organic Apples
4. If a small increase in the price of a product leads to a large decrease in the quantity demanded, the demand for the product is:
   1. A) Inelastic
   2. B) Elastic
   3. C) Unit elastic
   4. D) Perfectly inelastic
5. A local coffee shop raises its price from $3 to $3.50. As a result, their sales decrease by 30%. What is the price elasticity of demand for their coffee?
   1. A) 0.5
   2. B) 1
   3. C) 2
   4. D) 3
6. Which factor most likely contributes to a product having inelastic demand?
   1. A) Many substitutes are available
   2. B) It is a luxury good
   3. C) It is a necessity
   4. D) It represents a large portion of a consumer's income
7. If the demand for a product is perfectly elastic, the demand curve will be:
   1. A) Vertical
   2. B) Horizontal
   3. C) Upward sloping
   4. D) Downward sloping