Use the following data to answer the questions below:

a. Graph the consumption function with consumption spending on the vertical axis and disposable income on the horizontal axis.

b. If the consumption function is a straight line, what is its slope?

c. Fill in the saving column at each level of income.

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Real Disposable Income billions ($) $100 200 300 400 Consumption Expenditures billions ($) Saving billions ($) $150 200 250 300