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Match linear PES: 1. Slope: p. Constant 2. PES: q. Variable 3. Origin: r. Unitary

A1-p, 2-q, 3-r
B1-p, 2-r, 3-q
C1-q, 2-p, 3-r
D1-r, 2-p, 3-q
Answer & Solution
Correct answer: A. 1-p, 2-q, 3-r
Along a straight supply curve the slope is constant while elasticity varies, equaling one if passing through the origin.
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