The demand curve of a firm that is perfectly competitive is horizontal at the market price. As a result, every unit sold will result in it receiving the same price. The difference in total revenue from selling one more unit at the constant market price is the marginal revenue that the company receives.
The relationship between the cost of an item or service and the quantity demanded over a specific time period is represented graphically by the demand curve. The price and quantity demanded are often represented with the price on the left vertical axis and the horizontal axis, respectively. A demand curve in economics is a graph that shows the relationship between the cost of a given good and the amount that is desired at that cost. Demand curves can be applied to the price-quantity connection for either a specific consumer or for every consumer in a given market.
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