Price Elasticity-Total Revenue Relationship with a Linear Demand Curve

For the linear demand curves, price elasticity of demand falls as you move downward along the demand curve. The price elasticity is calculated by using the mid-point approach shows that at points on the demand curve with low price and high quantity, the portion of demand curve is inelastic (elasticity is less than 1) and at points with high price and low quantities the portion of demand curve is elastic (elasticity is greater than 1). At the mid-point of the curve, the elasticity is equal to 1 indicating the unit elastic point of the demand curve.