For a linear and upward sloping supply curve and a linear downward sloping demand curve, when the consumer has to pay a positive price for the good, the producer surplus is a
A. triangle.
B. rectangle.
C. four-sided figure that is a rectangle on the bottom and a right triangle on the top whose hypotenuse is the demand curve.
D. four-sided figure that is a rectangle on the bottom and a right triangle on the top whose hypotenuse is the supply curve.
Answer: A
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