The elasticity symbol in economics is represented by two Greek letters, epsilon (Ε) and eta (Η). Epsilon (7 letters) is used to represent the price elasticity of demand, which measures the responsiveness of the quantity demanded of a good or service to a change in its price. Eta (3 letters) is used to represent the income elasticity of demand, which measures the responsiveness of the quantity demanded of a good or service to a change in consumer income.