A demand function for a product takes the form: Q = 10 – 2P The own-price elasticity of demand is equal to: A. –2 × (P/Q) and elasticity varies with the P/Q ratio B. –P × (P/Q) and elasticity varies with the P/Q ratio C. –2P × (P/Q) and elasticity varies with the P/Q ratio D. –2 and thus elasticity is constant for all P/Q values Please provide explanation

Microeconomics: Private and Public Choice (MindTap Course List)
16th Edition
ISBN:9781305506893
Author:James D. Gwartney, Richard L. Stroup, Russell S. Sobel, David A. Macpherson
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A demand function for a product takes the form:
Q = 10 – 2P
The own-price elasticity of demand is equal to:
A. –2 × (P/Q) and elasticity varies with the P/Q ratio
B. –P × (P/Q) and elasticity varies with the P/Q ratio
C. –2P × (P/Q) and elasticity varies with the P/Q ratio
D. –2 and thus elasticity is constant for all P/Q values

Please provide explanation 

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