How does price elasticity apply to the decline of teeth whitening services offered by dentist offices?

The price elasticity of supply (PES) is one metric that can show the type of supply that a specific service or product has. The price elasticity of supply shows the response of producers to any price increase or decrease. Depending on the price elasticity of supply coefficient, the supply of a good or service can be classified as follows.

• PES=0 - The supply is perfectly inelastic. The supply is not responsive to price changes.
• 0>PES<1 - The supply is relatively inelastic. The supply will change in a smaller proportion than the price increase.
• PES=1 - The supply is unitary elastic. The changes in quantity supplied and price are equal.
• PES>1 - The supply is elastic. Price changes will cause bigger changes in proportion to the quantity supplied.

Therefore the demand for teeth whitening service could be classified as price elastic because the demand has been decreasing over time. This analysis is assuming that the price of teeth whitening service has decreased due to different factors such as competition.