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CONCAVE: A curve that is 'bowed-in' toward the origin, like entering a cave. Technically speaking, the slope of a concave curve decreases from left to right as the X-axis variable increases.

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TOTAL FACTOR COST CURVE, PERFECT COMPETITION

A curve that graphically represents the relation between total factor cost incurred by a perfectly competitive firm when using a given factor of production to produce a good or service. The total factor cost curve is most important in factor market analysis for the derivation of the marginal factor cost curve.

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