A straight-line supply curve has a price elasticity equal to 1 everywhere along it.

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A straight-line supply curve with a constant slope (i.e. a constant price elasticity) implies that the producer is willing to supply the same quantity of goods at any price along the curve, which is unrealistic. In reality, the price elasticity of supply is likely to vary depending on the cost structure, technology, and other factors affecting the producer's ability and willingness to respond to price changes. Therefore, the supply curve is likely to be more elastic at some points and less elastic at others, depending on the circumstances.

A Straight-Line Supply Curve Has a Price Elasticity Equal to 1