What do economists call a situation in which consumers buy a different quantity than they did before, at every price?

The figure above provides information about Light-U-Up Utilities, which is a natural monopoly that provides electricity

If Light-U-Up is regulated and must follow an average cost pricing rule, it will produce ________ and sell at a price of ________. A) 200 kwh; 30¢ per kwh B) 200 kwh; 25¢ per kwh C) 300 kwh; 20¢ per kwh D) 400 kwh; 15¢ per kwh

A measure of the way a quantity supplied reacts to a change in price:

a. subsidy b. supply schedule c. law of supply d. elasticity of supply e. excise tax