Question

When demand curve become vertical straight line? Explain in brief.
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Answer 1

Answer:

ADVERTISEMENTS: If the demand curve is horizontal its slope is zero, but its elasticity is infinite. By contrast, if the demand curve is a vertical straight line its slope is infinite, but elasticity is zero. If the demand curve is a straight line its slope is constant, but elasticity falls as price drops.

Answer 2

It becomes vertical straight when there is no change in quantity demanded but there is a change in price of the commodity .

And such situation is called perfectly inelastic demand.

The demand curve in this type of price elasticity will be like as shown in the picture.

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