(a) Perfectly Inelastic Supply: The supply is said to be perfectly inelastic when a change in price produces no change in the quantity supplied of a commodity. In such a case, quantity supplied remains constant regardless g of change in price. The supply curve in such a situation a is a vertical line, parallel to y-axis. Numerically, elasticity of supply is said to be equal to zero. (ELASTICITY OF SUPPLY = 0)
