Q: If a firm’s total revenue is calculated as the area of a rectangle on a graph, which formula should be used?

$$\text{Total Revenue} = \text{Price} \times \text{Quantity}$$

Q: What is the formula for calculating the percentage change in an economic variable?

$$\text{Percentage change} = \frac{\text{Value in the second period} - \text{Value in the first period}}{\text{Value in the first period}} \times 100$$

Question 1

Which of the following best describes the concept of scarcity in economics?

Accepted Answer

Scarcity means that resources are limited and cannot satisfy all human wants.

Question 2

A student is deciding whether to spend an extra hour studying for an exam or watching TV. According to economic theory, what should the student consider?

Accepted Answer

The marginal benefit and marginal cost of studying versus watching TV.

Question 3

Which of the following is an example of opportunity cost?

Accepted Answer

Choosing to attend college means giving up the income you could have earned working full-time.

Question 4

Suppose the price of pizza decreases from $$14 to 12$$, and the quantity demanded increases from 55 to 65 per week. What is the slope of the demand curve between these two points?

Accepted Answer

$$\frac{\Delta y}{\Delta x} = \frac{-2}{10} = -0.2$$

Question 5

Which of the following best explains why market economies tend to be more efficient than centrally planned economies?

Accepted Answer

Market economies promote productive and allocative efficiency through competition and voluntary exchange.

Question 6

A government increases student loan subsidies, making it easier for students to borrow. What is a possible unintended consequence according to economic incentives?

Accepted Answer

Colleges may increase tuition, knowing students can borrow more.

Question 7

Which of the following is a normative statement?

Accepted Answer

The government should increase the minimum wage to reduce poverty.

Question 8

If a firm’s total revenue is calculated as the area of a rectangle on a graph, which formula should be used?

Accepted Answer

$$	ext{Total Revenue} = 	ext{Price} 	imes 	ext{Quantity}$$

Question 9

Which of the following best describes a mixed economy?

Accepted Answer

An economy where most decisions result from market interactions, but the government plays a significant role.

Question 10

What is the formula for calculating the percentage change in an economic variable?

Accepted Answer

$$	ext{Percentage change} = \frac{	ext{Value in the second period} - 	ext{Value in the first period}}{	ext{Value in the first period}} 	imes 100$$

Question 11

Which of the following is an example of allocative efficiency?

Accepted Answer

A firm produces goods up to the point where the marginal benefit to consumers equals the marginal cost of production.

Question 12

Which of the following is a microeconomic issue?

Accepted Answer

How firms decide what prices to charge for their products.

Question 13

A graph shows a positive relationship between two variables. Which of the following statements is correct?

Accepted Answer

As one variable increases, the other variable also increases.

Question 14

Which of the following is a step in building an economic model?

Accepted Answer

Formulate a testable hypothesis.

Question 15

If the area of a triangle on a graph represents a certain economic value, which formula should be used?

Accepted Answer

$$	ext{Area of a triangle} = \frac{1}{2} 	imes 	ext{Base} 	imes 	ext{Height}$$

Question 16

Which of the following best describes voluntary exchange?

Accepted Answer

A transaction in which both the buyer and the seller are made better off.

Question 17

Which of the following is a possible problem when using graphs to analyze economic relationships?

Accepted Answer

Graphs may suggest causality when only correlation exists.

Question 18

Which of the following is the best example of a trade-off?

Accepted Answer

A government increases spending on healthcare, which means less funding is available for education.

Question 19

Which of the following is a key skill gained from studying economics?

Accepted Answer

Analyzing the likely consequences of choices made by individuals, businesses, and governments.

Foundations and Models in Macroeconomics: Chapter 1 Study Guide

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