Data on after-tax income and consumption spending for the Smith family are given in the table below.After-tax IncomeConsumption Spending$9,000$18,10014,00022,60019,00027,10024,00031,600Based on these data, the Smith family has a marginal propensity to consume of
A. 0.75.
B. 0.8.
C. 0.6.
D. 0.9.
Answer: D
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