IGCSE Economics-Fundamentals of Economics

Ashton is at a local market where he notices that when the price of apples decreases, more people are buying them. What does this observation illustrate about the law of demand?

• The law of demand indicates that price and quantity demanded are inversely related.

• The law of demand states that higher prices lead to higher quantity demanded.

• The law of demand indicates that quantity supplied increases as price decreases.

• The law of demand suggests that price and quantity demanded are directly related.

Answer explanation

The law of demand states that as prices rise, the quantity demanded decreases, and vice versa. Therefore, the correct choice is that price and quantity demanded are inversely related.

Nabil is studying how the market for oranges works. He learns that when there is an increase in the supply of oranges, it affects the equilibrium price. How does an increase in supply affect equilibrium price?

• An increase in supply causes the equilibrium price to fluctuate unpredictably.

• An increase in supply has no effect on the equilibrium price.

• An increase in supply increases the equilibrium price.

• An increase in supply decreases the equilibrium price.

Answer explanation

An increase in supply leads to a surplus of goods, which typically drives the equilibrium price down as sellers compete to attract buyers. Therefore, the correct answer is that an increase in supply decreases the equilibrium price.

Ashton is studying the concept of elasticity of demand in his economics class. He learns that elasticity of demand is a measure of the responsiveness of quantity demanded to changes in price. Can you help him define elasticity of demand?

• Elasticity of demand is the same as demand curve slope.

• Elasticity of demand is a measure of the responsiveness of quantity demanded to changes in price.

• Elasticity of demand measures the total sales of a product.

• Elasticity of demand refers to consumer income levels.

Answer explanation

Elasticity of demand measures how much the quantity demanded changes in response to price changes, making it a key concept in understanding consumer behavior and market dynamics.

What does it mean if demand is elastic?

• Demand is elastic when quantity demanded remains constant regardless of price changes.

• Demand is elastic when a change in price results in a proportionally larger change in quantity demanded.

• Demand is elastic when a decrease in price leads to a decrease in quantity demanded.

• Demand is elastic when a change in price results in no change in quantity demanded.

Answer explanation

Demand is elastic when a change in price results in a proportionally larger change in quantity demanded, meaning consumers are sensitive to price changes.

Hannah is deciding whether to spend her Saturday working at a part-time job or going to a concert with friends. The concert ticket costs $50, and she could earn $60 by working. Explain the concept of opportunity cost in this scenario.

• Opportunity cost refers to the time spent on a decision.

• Opportunity cost is the amount of money spent on a decision.

• Opportunity cost is the value of the next best alternative that is forgone when making a decision.

• Opportunity cost is the total cost of all alternatives combined.

Answer explanation

Opportunity cost is the value of the next best alternative that is forgone when making a decision. It highlights the trade-offs involved in choosing one option over another, making it a key concept in economics.

In a city where MengTze and Lucy live, the government has imposed a price ceiling on rent to make housing more affordable. How does this price ceiling affect supply and demand for apartments?

• A price ceiling has no effect on supply and demand, maintaining equilibrium.

• A price ceiling increases both supply and demand, resulting in a balanced market.

• A price ceiling increases quantity demanded and decreases quantity supplied, leading to a shortage.

• A price ceiling decreases demand and increases supply, leading to a surplus.

Answer explanation

A price ceiling sets a maximum price, increasing quantity demanded as consumers want more at the lower price, while suppliers reduce quantity supplied due to lower profitability, resulting in a shortage.

Emma and Aiden are discussing what factors can cause a shift in the demand curve for their favorite video games. They consider various influences but are wanting to understand the main factors-which ones are the main factors?

• Factors causing a shift in the demand curve include changes in income, preferences, prices of related goods, future price expectations, and number of buyers.

• Technological advancements in manufacturing

• Changes in weather patterns

• Government regulations on production

Answer explanation

The correct choice identifies key factors that shift the demand curve, such as income changes and preferences, unlike the other options which relate more to supply or external conditions.

Yuchen and MengTze are discussing the difference between a change in quantity demanded and a change in demand. Yuchen believes that a change in quantity demanded affects the overall market, while MengTze thinks that a change in demand only impacts individual consumers. What is the correct distinction between these two concepts?

• A change in quantity demanded affects the overall market, while a change in demand only impacts individual consumers.

• A change in quantity demanded is caused by consumer preferences, while a change in demand is due to price changes.

• A change in quantity demanded is a movement along the curve due to price changes; a change in demand is a shift of the curve due to other factors.

• A change in quantity demanded shifts the curve, while a change in demand moves along the curve.

Answer explanation

A change in quantity demanded refers to movements along the demand curve due to price changes, while a change in demand indicates a shift of the entire curve caused by factors other than price, such as consumer preferences.

Alya is trying to decide between two brands of soda, Brand A and Brand B. If the price of Brand A increases, how do substitutes like Brand B affect the elasticity of demand for Brand A?

• Substitutes have no effect on the elasticity of demand.

• Substitutes increase the elasticity of demand.

• Substitutes decrease the elasticity of demand.

• Substitutes make demand perfectly inelastic.

Answer explanation

Substitutes increase the elasticity of demand because when there are available alternatives, consumers can easily switch to them if the price of a good rises, making demand more responsive to price changes.

Tina is deciding whether to spend her weekend studying for an upcoming exam or going out with friends. Why is opportunity cost important in her decision making?

• Opportunity cost is important because it helps evaluate the trade-offs in decision making.

• Opportunity cost is the same as direct costs.

• Opportunity cost is irrelevant in financial planning.

• Opportunity cost only applies to large investments.

Answer explanation

Opportunity cost is crucial in decision making as it allows individuals to assess the trade-offs involved in their choices, ensuring they consider what they forgo when selecting one option over another.