ECO105Y1 Lecture Notes - Lecture 3: Demand Curve, Normal Good, Inferior Good

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28 Nov 2017

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Combines two forces switch to substitutes, willingness, ability to pay, determined quantity demanded, and can be read, a demand curve and as a marginal benefit curve. Demand = relationship // quantity demand = number. The amount you actually plan to buy at a given price an amount; always found on the x-axis. The sum of demands of all individuals willing, and able to buy a particular product or service. If the price of a product or service rises, quantity demanded decreases, other things remaining the same. The only thing that can move along a demand curve is something caused by a change in price. Quality demanded changes only with a change in price. A movement along the curve can only be caused by a change in price. A catch-all term summarizing all possible influences on consumer"s willingness and ability to pay for a particular product or service.

Related Questions

Which of the following is the correct definition of demand schedule?

a. The quantity of a good or service that a consumer is willing to purchase at a given price.

b. A table showing the relationship between the price of a product and the quantity of the product demanded.

c. A curve that shows the relationship between the price of a product and the quantity of the product demanded.

maroonferret252

QUESTION 1

The demand for oranges increases while the supply decreases. The equilibrium price of oranges ________, and the equilibrium quantity ________.

		falls; increases
		falls; perhaps changes but we can't say if it increases, decreases, or stays the same
		rises; decreases
		rises; perhaps changes but we can't say if it increases, decreases, or stays the same

1 points

QUESTION 2

Assume a competitive market is in equilibrium. There is an increase in demand, but no change in supply. As a result the equilibrium price ________, and the equilibrium quantity is ________.

		rises; increases
		falls; decreases
		falls; does not change
		rises; does not change

1 points

QUESTION 3

Bagels and cream cheese are complementary goods. Suppose that the price for flour, which is used to produce bagels, increases. The equilibrium price of cream cheese ________ and the equilibrium quantity of cream cheese ________.

		does not change; does not change
		rises; increases
		falls; decreases
		rises; decreases

1 points

QUESTION 4

If consumers buy a large number of plug-in electric cars, the equilibrium price of electricity will ________ and the equilibrium quantity of electricity will ________.

		rise; increase
		rise; decrease
		fall; increase
		fall; decrease

1 points

QUESTION 5

Which of the following shifts the supply curve for oranges?

		an increase in income for all orange consumers if oranges are a normal good
		disastrous weather that destroys about half of this year's orange crop
		an increase in the price of bananas, a substitute in consumption for oranges
		a newly discovered increase in the nutritional value of oranges

1 points

QUESTION 6

Which of the following shifts the supply curve of rutabagas rightward? (A rutabaga is a potato-like vegetable.)

		normal goods in production.
		an exceptionally cold summer that killed much of the rutabaga crop.
		a fall in the price of fertilizer used to grow rutabagas.
		an increase in the price of a rutabaga

1 points

QUESTION 7

Suppose over the next several years the productivity of firms producing electric cars improves dramatically. The advance in productivity leads to

		an increase in the supply electric cars so that the supply curve shifts rightward.
		an increase in the supply of electric cars so that the supply curve shifts leftward.
		a decrease in the supply of electric cars so that the supply curve shifts rightward.
		a decrease in the supply of electric cars so that the supply curve shifts leftward.

1 points

QUESTION 8

Hot dogs and hot dog buns are complements. If the price of a hot dog falls, then

		the demand for hot dogs will increase.
		the demand for hot dog buns will decrease.
		the quantity demanded of hotdogs will decrease.
		the demand for hot dog buns will increase.

1 points

QUESTION 9

Demand curves slope ________ because as the price increases and other things remain the same, the quantity demanded ________.

		upward; increases
		downward; decreases
		upward; decreases
		downward; increases

1 points

QUESTION 10

Water bottlers announce that next month the price of bottled water will rise by 25 percent. Which of the following occurs immediately?

		The quantity of bottled water demanded increases.
		The demand for bottled water increases.
		The quantity of bottled water demanded decreases.
		The demand for bottled water decreases.

1 points

QUESTION 11

If the price of carrots is below the equilibrium price, the

		quantity supplied of carrots exceeds the quantity demanded and a shortage exists.
		quantity demanded of carrots exceeds the quantity supplied and a shortage exists.
		quantity supplied of carrots exceeds the quantity demanded and a surplus exists.
		quantity demanded of carrots exceeds the quantity supplied and a surplus exists.

1 points

QUESTION 12

Which of the following is true regarding demand?
i. Demand is the relationship between quantity demanded and the price of a good when all other influences on buying plans remain the same.
ii. Demand refers to one quantity at one time.
iii. "Demand" and " quantity demanded" are the same thing.

		both i and ii
		i only.
		ii only.
		iii only.

1 points

QUESTION 13

Suppose the current price of a pound of steak is $6 per pound and the equilibrium price is $9 per pound. What takes place?

		There is a shortage, so the price rises and quantity demanded decreases.
		There is a shortage, so the price rises and quantity demanded increases.
		There is a shortage, so the price falls and quantity demanded increases.
		There is a surplus, so the price falls and quantity demanded increases.

1 points

QUESTION 14

The number of corn producers increases, so the supply of corn ________ and the supply curve of corn ________.

		decreases; shifts leftward
		decrease; shifts rightward
		increases; shifts rightward
		increases; shifts leftward

1 points

QUESTION 15

Market equilibrium

i. can never occur because there are always people who want a good but cannot afford it.

ii. occurs at the intersection of the supply and demand curves.

iii. is the point where the price equals the quantity.

		iii only
		ii and iii
		ii only
		i only

1 points

QUESTION 16

Milk can be used to produce cheese or butter. If the price of a pound of butter rises, what happens to the supply of cheese?

		The supply of cheese stays the same and there is a decrease in the quantity supplied of cheese.
		The supply of cheese decreases.
		The supply of cheese stays the same and there is no change in the quantity supplied of cheese.
		The supply of cheese increases.

1 points

QUESTION 17

Consumers regard Dell computers and Apple computers as substitutes. If the price of a Dell computer decreases, the

		demand for Dell computers decreases.
		demand for Apple computers increases.
		demand for Apple computers decreases.
		demand for Dell computers increases.

1 points

QUESTION 18

Suppose the current price of a pound of steak is $12 per pound and the equilibrium price is $9 per pound. In this case, there is a

		surplus, so the price rises and quantity demanded increases.
		shortage, so the price rises and quantity demanded decreases.
		surplus, so the price falls and quantity demanded increases.
		shortage, so the price falls and quantity demanded increases.

1 points

QUESTION 19

Plywood is used in the construction of houses. If the price of plywood rises, what happens to the supply of houses?

		The supply increases so that the supply curve shifts rightward.
		The quantity supplied increases but there is no shift in the supply curve.
		The supply decreases so that the supply curve shifts leftward.
		The quantity supplied decreases but there is no shift in the supply curve.

1 points

QUESTION 20

In stores, it is common to find seasonal products marked down when the season ends. What explains this behavior?

		The store is trying to increase its customers' demand for the product.
		The law of demand is being used to increase the quantity demanded.
		The store manager must be trying to drive away customers by selling low quality products.
		The store is trying to increase its consumer's incomes by increasing their purchasing power.

1 points

QUESTION 21

Suppose that the price of flour used to produce bagels increases. Hence the equilibrium price of a bagel ________ and the equilibrium quantity ________.

		rises; increases
		rises; decreases
		falls; increases
		falls; decreases

1 points

QUESTION 22

If both the supply and demand curves shift simultaneously, we can always predict what will happen to

		either the price or the quantity, but not both.
		only the quantity.
		only the price.
		both the price and the quantity.

1 points

QUESTION 23

If income increases and the demand for bus rides decreases,

		bus rides are a substitute good.
		consumers are behaving irrationally.
		bus rides are an inferior good.
		bus rides are a normal good.

1 points

QUESTION 24

A surplus of cardboard boxes means that

		at the current price of a cardboard box, the quantity demanded equals the quantity supplied and the price will fall to restore the equilibrium..
		the current price of a cardboard box is less than the equilibrium price.
		at the current price of a cardboard box, the quantity demanded exceeds the quantity supplied.
		at the current price of a cardboard box, the quantity demanded is less than the quantity supplied.

1 points

QUESTION 25

If a freeze destroys oranges before they are harvested, the equilibrium price of an orange ________ and the equilibrium quantity ________.

		rises; increases
		rises; decreases
		falls; increases
		falls; decreases

1 points

turquoisedeer344

When demand for a good is very elastic, revenue ________ when the price falls.

(2)

An elasticity measure less than one means that demand is __________.

(3)

An elasticity measure greater than one means that demand is __________.

(4)

The Latin expression ceteris paribus means

	having made all other necessary changes.
	holding constant all other variables.
	assuming all households have similar incomes.
	given the level of income in the economy.

(5)

A variable measured in terms of money is called a ____________________.

	real variable
	nominal variable
	macroeconomic variable
	microeconomic variable

(6)

Which of the following is true about the importance of money in economics?

	Money is important in both macroeconomics and microeconomics.
	Money is important in macroeconomics but not microeconomics.
	Money is important in microeconomics but not macroeconomics.
	Money is not important in either microeconomics or macroeconomics.

(7)

What is the difference between normative and positive economics?

	Positive economics is descriptive and predictive; normative economics is prescriptive.
	Positive economics highlights the positive aspects of the economy; normative economics highlights the average features.
	Positive economics studies the actions of individuals; normative economics studies the actions of households.
	Positive economics is an applied social science; normative economics is a theoretical social science.

(8)

The slope of the demand curve is negative because

	the quantity of a good demanded decreases as income declines.
	the quantity of a good demanded increases as income declines.
	the quantity of a good demanded increases as the price declines.
	the quantity of a good demanded decreases as the price declines.

(9)

What is the result of an increase in the price of bread, a normal good?

	The demand curve shifts to the right.
	The demand curve shifts to the left.
	The quantity demanded increases.
	The quantity demanded decreases.

(10)

What is the effect on demand for bread when the price of bagels, a substitute for bread, rises?

	The demand curve for bread shifts to the right.
	The demand curve for bread shifts to the left.
	The quantity of bread demanded increases.
	The quantity of bread demanded decreases.

(11)

Which of the following would cause the supply curve for bread to shift inward?

	An increase in the price of bread
	An increase in the price of bagels
	A decrease in the price of bread
	An increase in the price of flour

(12)

An improvement in technology shifts the supply curve outward because

	at every price, firms find producing the good to be more profitable.
	the price of the good increases.
	at every price, firms find producing the good to be less profitable.
	the price of the good decreases.

(13)

Which of the following factors does not affect how much bread a baker is willing to produce?

	The price of bread
	The demand for bread
	The cost of inputs
	Technology

(14)

How do expectations of prices affect how much of a good producers are willing to sell?

	Expectations of prices affect only demand, not supply.
	Actual prices, not expectations of prices, affect supply.
	If producers expect prices to fall in the future, they supply less at every price.
	If producers expect prices to rise in the future, they supply less at every price.

(15)

When the price of a good is above equilibrium level,

	the quantity demanded exceeds the quantity supplied.
	the quantity supplied exceeds the quantity demanded.
	the supply curve shifts to the left.
	the supply curve shifts to the right.

(16)

At a price of P₀ in the diagram below, which of the following statements is true?

	Supply equals demand.
	There is excess demand.
	There is excess supply.
	There is scarcity.

(17)

If demand for bread increases at every price, the equilibrium price of bread will

	fall.
	rise.
	remain unchanged.
	depend on income.

(18)

If the demand for bread declines, then

	at the original equilibrium price, there is excess demand.
	at the original equilibrium price, there is excess supply.
	the supply curve shifts to the right.
	the supply curve shifts to the left.

(19)

Peanut butter and jelly are complementary goods. When the price of peanut butter rises, the demand for jelly ________ and the price of jelly ________.

	rises; falls
	rises; rises
	falls; rises
	falls; falls

(20)

The measure of elasticity that economists use is

	always a positive number.
	always a negative number.
	positive when demand is elastic and negative when demand is inelastic.
	negative when demand is elastic and positive when demand is inelastic.

(21)

Which of the following formulas is the correct expression for the slope of a line?

(22)

Graphically how would an increase in income affect the demand for hamburgers?

	The slope of the demand curve would increase.
	The slope of the demand curve would decrease.
	The demand curve would shift outward, parallel to the original demand curve.
	The demand curve would shift inward, parallel to the original demand curve.

(23)

Given the equation P = $6.00 ? $.40Q, where P is the price of the good and Q is the quantity of the good demanded, how many units will this consumer demand if the price is $3.60?

	1.44 units
	3 units
	3.6 units
	6 units

(24)

Which of the following is true about unit elasticity?

	Revenues remain unchanged when the price changes.
	Elasticity of demand increases as one moves down the demand curve.
	Elasticity of demand decreases as one moves down the demand curve.
	The elasticity of demand is greater than one at every point along the demand curve.

(25)

Which of the following could be a determinant of the quantity demanded of a good?

	The price of the good
	The price of related goods
	Income
	Expectations about the future price of the product
	All of the above

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ECO105Y1 Lecture Notes - Lecture 3: Demand Curve, Normal Good, Inferior Good

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