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If disposable income increases from $7 trillion to $8 trillion, and at the same time, consumption expenditure increases from $6.8 trillion to $7.8 trillion, what is the marginal propensity to consume (MPC)?

A. $7.8 trillion; 0.60
B. $7.6 trillion; 0.80
C. $7.4 trillion; 0.40
D. $8 trillion; 1.00

Answer :

Final answer:

The marginal propensity to consume (MPC) is calculated by dividing the change in consumption expenditure by the change in disposable income. In this case, both changed by $1 trillion, giving an MPC of 1. Therefore, the correct answer is D. $8 trillion; 1.00.

Explanation:

To calculate the marginal propensity to consume (MPC), we look at the change in consumption expenditure divided by the change in disposable income. From the data provided, disposable income increased from $7 trillion to $8 trillion, which is a change of $1 trillion. Simultaneously, consumption expenditure increased from $6.8 trillion to $7.8 trillion, also a change of $1 trillion.

Thus, using the formula for MPC which is:

MPC = Change in Consumption Expenditure / Change in Disposable Income

We calculate the MPC as: $1 trillion / $1 trillion = 1.

The correct answer to the question is D. $8 trillion; 1.00, as the change in consumption matches the change in disposable income, pointing to an MPC of 1.

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Rewritten by : Jeany