What happens to the demand curve for toasters if the price of bread rises? Show in a supply-demand diagram how the equilibrium price and quantity of toasters change.
The Correct Answer and Explanation is:
If the price of bread rises, the demand for toasters will decrease, assuming that bread and toasters are complementary goods. Complementary goods are items that are typically used together—people usually use bread with a toaster to make toast. When the price of one complement (bread) goes up, its consumption may decrease, reducing the demand for the related good (toasters).
📉 Correct Answer:
The demand curve for toasters shifts to the left. As a result, the equilibrium price and quantity of toasters both decrease.
📊 Explanation (300+ words):
In economics, complementary goods are products that are used together, such as printers and ink cartridges or smartphones and phone chargers. A toaster is often used in conjunction with bread, so they are considered complements.
When the price of bread increases, consumers may buy less bread because it has become more expensive. Since fewer people are buying or using bread, the usefulness of owning a toaster declines. This leads to a decrease in the demand for toasters.
Graphically, this is shown by a leftward shift of the demand curve for toasters. Originally, the toaster market is in equilibrium where the initial demand curve (D1) intersects the supply curve (S), determining the initial equilibrium price (P1) and quantity (Q1).
After the price of bread increases, the new demand curve (D2) lies to the left of D1. This shift results in a new equilibrium point where D2 intersects the supply curve. At this new point, the equilibrium price falls to P2 and the quantity demanded and supplied falls to Q2.
This means fewer toasters are sold, and at a lower price.
📉 Supply-Demand Diagram Description:
Price
|
P1 |--------● (Initial equilibrium: D1 ∩ S)
| /
P2 |------● (New equilibrium: D2 ∩ S)
| /
| /
| /
| /
| / D1
|/ D2
------------------------- Quantity
Q2 Q1
Summary: When the price of a complementary good (bread) rises, the demand for the associated good (toasters) decreases. This shifts the demand curve left, resulting in a lower equilibrium price and quantity for toasters.