Straight line (linear) demand curve If the demand curve is linear (straight line), it has a unitary elasticity at the midpoint. The total revenue is maximum at this point. Any point above the midpoint has elasticity greater than 1, (Ed > 1).

Does a straight line demand curve have constant elasticity?

The slope of a straight-line demand curve, one with a constant slope, has constantly changing elasticity. No two points on a straight-line demand curve have the same elasticity. The price elasticity of demand is different at each point on a demand curve with constant slope.

Why elasticity changes along a straight line demand curve?

The price elasticity of demand varies between different pairs of points along a linear demand curve. The lower the price and the greater the quantity demanded, the lower the absolute value of the price elasticity of demand. The absolute value of the price elasticity of demand is thus relatively large.

How can you measure price elasticity at a point on a straight line demand curve?

If point R lies exactly at the middle of this straight- line demand curve tT, then the distance RT will be equal to the distance Rt. Therefore, elasticity which is equal to RT/Rt will be equal to one at the middle point of the straight- line demand curve.

Why perfectly elastic demand curve is horizontal?

Perfectly elastic demand curve is horizontal straight line. This is because at the given price the quantity demanded is infinite, even if there is a slight change in the price the demand becomes infinity and hence the curve is flat.

What section of a straight line demand curve is elastic?

Below the midpoint of a straight line demand curve, elasticity is less than one and the firm wants to raise price to increase total revenue. Above the midpoint, elasticity is greater than one and the firm wants to lower price to increase total revenue. At the midpoint, E1, elasticity is equal to one, or unit elastic.