Because a perfectly competitive firm has no market power,its marginal cost curve is flat (i.e. ,horizontal).

Name: Because a perfectly competitive firm has no market power,its marginal cost curve is flat (i.e. ,horizontal).
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In a perfectly competitive market, a firm's marginal cost curve is upward sloping, reflecting increasing costs as output increases, not flat. The firm's price is determined by the market, not its marginal cost curve.

Because a Perfectly Competitive Firm Has No Market Power,its Marginal