Explanation:
Let us understand the term what is elastic & "inelastic".
Elastic: It is the change in the behavior of the buyer & the seller when the product price changes.
Elastic goods will always have an substitute.
Example: Books, pencil, Notebook, bread, etc,
Inelastic means: This is opposite of elastic. There will be same number of buyers when the price goes up or down.
Whether the price gets raise or lower daily we need food. So food is inelastic.
Eg. food, prescription drugs, and tobacco products
