Linear Demand Curve Elasticity Explained
For a linear demand curve, the price elasticity of demand is not constant. It changes as we move along the curve from one point to another.
Movement Along the Demand Curve
- As price falls and quantity demanded rises (moving down the curve), the ratio of price to quantity ($P/Q$) decreases.
- The slope of a linear demand curve ($\frac{dQ}{dP}$) is constant but negative.
Elasticity Calculation
The point elasticity formula is $E_d = \frac{dQ}{dP} \times \frac{P}{Q}$.
Because the slope ($\frac{dQ}{dP}$) is constant and negative, and the ratio $\frac{P}{Q}$ decreases as we move down the curve, the absolute value of the elasticity ($|E_d|$) also decreases.
Conclusion
This means that elasticity declines as one slides down the demand curve. At the top (high price), demand is elastic; at the bottom (low price), demand is inelastic; and at the midpoint, it is unit elastic.
Important Questions from Demand analysis
- If the gross elasticity of demand is negative, the two products in consideration are __________ products.
In the above diagram, if curve IC represents income - consumption curve, then it means that :
- A consumer spends ₹ 240 when the price of the commodity is ₹ 15 and ₹ 300 when the price rises to ₹ 20. The elasticity of demand is :
Which one of the following demands states consumers are adequately buying all the products put into the marketplace?
Given below are two statements. one labelled as Assertion (A) and the other labelled as Reason (R).
Assertion (A): Auto companies and other consumer goods companies offer cash rebates to encourage purchase of the manufacturer's products within a specified period
Reason (R): The same product is priced differently at different times
In the context of the two statements above related to pricing strategy, which one of the following options is correct?
