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Reading Comprehension: Detail Function Questions

The author of the passage most likely mentions basic economic models in order to

Excellent!

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The author tells us that, usually, demand is a function of price. However, when talking about price elasticity of demand, this general rule does not apply. 

Incorrect.

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The author does not make any claims that either support or question the basic economic models.

Incorrect.

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The author does not make any claims that either support or question the basic economic models.

Incorrect.

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Although the author states that, in certain cases, price and demand are unrelated, this does not mean that this is true in all cases.

Incorrect.

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The author makes no judgments about people who study price elasticity of demand (or any economists at all).

show that price elasticity of demand is an exception to a general rule
argue in favor of mainstream economic theories
question their overall validity
postulate that price and demand are completely unrelated
argue that economists who study price elasticity of demand do not adhere to mainstream economic theories