Sumaiya, who consumes pepsi and pizza, gets a raise in her income from $300 to $400. Pepsi costs her $2 per glass and pizza costs $10. a. Show what happens to her optimal consumption point if both Pepsi and pizza are normal good? b. Show what happens if pizza is an inferior good.

Principles of Microeconomics
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Author:N. Gregory Mankiw
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Chapter4: The Market Forces Of Supply And Demand
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Sumaiya, who consumes pepsi and pizza, gets a raise in her income from $300 to
$400. Pepsi costs her $2 per glass and pizza costs $10.
a. Show what happens to her optimal consumption point if both Pepsi and pizza
are normal good?
b. Show what happens if pizza is an inferior good.

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