Final answer:
A government-set maximum price of $40 would be referred to as a price ceiling. It is a legal limit on the price of a good or service, set below the equilibrium price.
Step-by-step explanation:
In the given market, a government-set maximum price of $40 would be referred to as a price ceiling. A price ceiling is a legal limit on the price of a good or service, set below the equilibrium price. It aims to make the good or service more affordable for consumers.