1. Elasticity Examples

2. Perfectly Inelastic & Perfectly Elastic
Example 1 at the top illustrates Perfectly Inelastic Demand. This is illustrated by a vertical D (Demand) slope.
Example 2 at the bottom illustrates Perfectly Elastic Demand. This is illustrated by a horizontal D (Demand) slope.

3. Elastic, Inelastic, and Unit Elastic
Example A on the upper left illustrates an elastic demand curve. Example B on the upper right illustrates the inelastic demand curve. Example C on the bottom illustrates unit-elastic demand.