JAMB Economics 2011 Question 8

Question 8

Theory of Demand

Use the table below to answer the question.
Price(₦) | Quantity (kg)
1 | 100
2 | 120
3 | 150
4 | 180
5 | 200
The graph of the schedule above will depict

  1. A.a kinked demand curve
  2. B.a normal demand curve
  3. C.an abnormal demand curve
  4. D.a diminishing marginal utility curve.
Show the answer and explanation

Answer: C (an abnormal demand curve)

Explanation

As the price rises from ₦1 to ₦5, the quantity rises from 100 kg to 200 kg. A demand curve that slopes upwards like this is abnormal.