Q: Which formula correctly calculates the slope of a straight line on a graph?

$$ \text{Slope} = \frac{\Delta y}{\Delta x} $$

Q: Refer to the demand curve for pizza. If 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?

$$ \text{Slope} = \frac{12 - 14}{65 - 55} = \frac{-2}{10} = -0.2 $$

Q: What is the area of a rectangle representing total revenue on a graph where the price per bottle is $2.00 and the quantity sold is 125,000 bottles?

$$ \text{Total Revenue} = 2.00 \times 125,000 = 250,000 $$

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

According to economic theory, what is the opportunity cost of a government increasing funding for space exploration?

Accepted Answer

The highest-valued alternative that must be given up, such as funding for cancer research.

Question 3

Which of the following is an example of a positive economic statement?

Accepted Answer

Increasing the minimum wage will lead to higher unemployment among teenagers.

Question 4

A firm can produce a product using either more labor or more machines. If the cost of labor rises, what is the firm most likely to do?

Accepted Answer

Switch to a production technique that uses more machines and less labor.

Question 5

Which formula correctly calculates the slope of a straight line on a graph?

Accepted Answer

$$ 	ext{Slope} = \frac{\Delta y}{\Delta x} $$

Question 6

Refer to the demand curve for pizza. If 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

$$ 	ext{Slope} = \frac{12 - 14}{65 - 55} = \frac{-2}{10} = -0.2 $$

Question 7

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 8

If a government policy unintentionally gives colleges an incentive to increase tuition, this is an example of:

Accepted Answer

Unintended consequences resulting from changes in economic incentives.

Question 9

Which of the following is a normative statement?

Accepted Answer

The government should provide free healthcare to all citizens.

Question 10

What is the area of a rectangle representing total revenue on a graph where the price per bottle is $2.00 and the quantity sold is 125,000 bottles?

Accepted Answer

$$ 	ext{Total Revenue} = 2.00 	imes 125,000 = 250,000 $$

Question 11

Which of the following best describes allocative efficiency?

Accepted Answer

Production is in accordance with consumer preferences, where marginal benefit equals marginal cost.

Question 12

Suppose the price of hamburgers increases. According to the demand curve for pizza, what is likely to happen to the demand for pizza?

Accepted Answer

The demand for pizza will increase, shifting the demand curve to the right.

Question 13

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

Accepted Answer

Formulate a testable hypothesis.

Question 14

If the area of a triangle on a graph has a base of 25,000 and a height of $0.50, what is the area?

Accepted Answer

$$ 	ext{Area} = \frac{1}{2} 	imes 25,000 	imes 0.50 = 6,250 $$

Question 15

Which of the following is an example of voluntary exchange?

Accepted Answer

A consumer buys a coffee from a café, and both the buyer and seller are better off.

Question 16

What is the main difference between microeconomics and macroeconomics?

Accepted Answer

Microeconomics studies individual households and firms, while macroeconomics studies the economy as a whole.

Question 17

If disposable personal income increases from $$16,000 billion to 18$$,000 billion and consumption spending increases from $$13,000 billion to 15$$,000 billion, what is the slope of the line representing the relationship between these two variables?

Accepted Answer

$$ 	ext{Slope} = \frac{15,000 - 13,000}{18,000 - 16,000} = \frac{2,000}{2,000} = 1 $$

Question 18

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

Accepted Answer

Graphs may suggest causality when only correlation exists.

Question 19

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

Accepted Answer

$$ 	ext{Percentage Change} = \frac{	ext{New Value} - 	ext{Old Value}}{	ext{Old Value}} 	imes 100 $$

Chapter 1: Foundations and Models in Microeconomics

Guida di studio - Domande di pratica

Study guide - Flashcard