Calculating Income Elasticity of Demand: Examples and Formulas

The video tutorial explains the concept of income elasticity of demand (YED) using examples. It covers how to calculate percentage changes in demand and income, interpret YED values, and identify inferior goods. The tutorial also includes an advanced example requiring formula manipulation and introduces the YED elasticity triangle as a tool for simplifying calculations.

How did John's salary change, and what impact did it have on his consumption of cereals?

What is the formula for calculating income elasticity of demand?

How do you calculate the percentage change in demand?

What was the percentage change in John's income, and how was it calculated?

What does a negative YED value indicate about a good?

If Iqbal's income increased by 25% and the YED value is 4, how many films will he purchase after the increase?

Explain how the elasticity triangle can be used to manipulate the YED formula.