Determine whether each of the following items is elastic or inelastic: bottled water, gourmet coffee, Apple cell phones, and gasoline. Explain your reasoning.

This is a discussion post. The price elasticity of demand is peoples responsiveness of quantity demanded (or consumption) when there is a change in price. Prior to beginning work on this discussion forum, read Chapter 4 of the textbook.
One resource has to be from the coursebook.
Respond to the following:

Identify the determinants of the price elasticity of demand. Explain each one.
Determine whether each of the following items is elastic or inelastic: bottled water, gourmet coffee, Apple cell phones, and gasoline. Explain your reasoning.
Distinguish between a necessity and a luxury.
How are the price elasticity of demand and total revenue related? Why is the price elasticity of demand important to pricing?

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