Elasticity of Demand App

For Economics & Society (SMU) by Kosmas Marinakis, Ph.D.

Set two demand curves, then drag along either one to compare their price elasticity of demand.

Demand formula A

P = a − bQ
ε = −(1/b)·(P/Q)

Demand formula B

P = a − bQ
ε = −(1/b)·(P/Q)

Graph

Drag either curve, or click near it, to move its point.

Demand A
Point elasticity of demand (ε)

Price
Quantity
Total revenue (P·Q)
Marginal revenue (Δ(P·Q)/ΔQ)
Demand B
Point elasticity of demand (ε)

Price
Quantity
Total revenue (P·Q)
Marginal revenue (Δ(P·Q)/ΔQ)

Notes for these parameters