本题目来源于试卷: IB Economics Unit 2.1: Microeconomics - Demand & Supply, Equilibrium，类别为 IB经济学
[单选题]
What could explain a decrease in demand forxt9f6kvct 5) e nkv:fz;j (v+ga+)czk.:abo y us 53:6hskiu6axuua639 maa5zlt9ywgf ed cars?
A. A rise in the price of used cars
B. A rise in the price of petrol
C. A growing distaste for public transit
D. A rise in the price of new cars
参考答案: B
本题详细解析:
Key ideas
A decrease ihghw nhr52: or+sm+4s n demand refers to a leftward shift of the demand curve.
Only non-price determinants of demand can shift the demand curve.
Explanation:
B is correct, as petrol and cars are complementary goods. If the price of petrol goes up, fewer people will want to buy cars (used or otherwise).
Choice A is incorrect because a rise in the price of used cars would cause a decrease of quantity demanded—a movement along the demand curve—not a shift of the demand curve.
Choices C and D are both incorrect as public trans5+ro2nm+4g rw hss h:hit and new cars are substitutes for used cars. Therefore, a growing distaste for public transit and a rise in price for new cars should both increase demand for used cars.
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