The construction of demand and supply curves assumes that the primary variable inﬂuencing decisions to produce and purchase goods is

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The construction of demand and supply curves assumes that the primary variable influencing decisions to produce and purchase goods is price. This is because the law of demand states that as the price of a good increases, the quantity demanded decreases, while the law of supply states that as the price of a good increases, the quantity supplied increases. Therefore, price is the variable that brings about movement along the demand and supply curves.

The Construction of Demand and Supply Curves Assumes That the Primary