Suppose
measures an economy's personal consumption expenditure and x the personal income, both in billions of dollars. Then,
measures the economy's savings corresponding to an income of x billion dollars. Then
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The quantity dS/dx is called the marginal propensity to save.
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For the consumption function , find the marginal propensity to save.
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A. $0.43 billion/billion dollars
B. $0.286 billion/billion dollars
C. $0.68 billion/billion dollars
D. $0.337 billion/billion dollars
Answer: B
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B. Domain: ?
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