4. The price elasticity tells a seller whether they should raise the prices of their good. An inelastic demand is needed whether income is high or low. The price elasticity of a necessity is less than one because no matter how much you raise the price, a person will buy the good because it is needed for them to live and thrive. | 4. The price elasticity tells a seller whether they should raise the prices of their good. An inelastic demand is needed whether income is high or low. The price elasticity of a necessity is less than one because no matter how much you raise the price, a person will buy the good because it is needed for them to live and thrive. |