Question

a perfectly inelastic demand curve has an elasticity coefficient of:
a. 0.
b. infinity.
c. 1.
d. some value between 0 and 1.

Explanation:

Price elasticity of demand measures how much quantity demanded changes with price. A perfectly inelastic demand means quantity demanded does not change at all when price changes, so its elasticity coefficient is 0.

Answer:

a. 0.