Answer :
The change in GDP if the MPC is 0.80 and the level of investment is $8 billion, is $40 billion
The change in GDP if the MPC is 0.67 is $24.24 billion.
How to find the change in GDP?
The change in GDP as a result of a change in investment spending can be found by the formula:
= Increase in investment x Multiplier
The multiplier is found by the formula:
= 1 / (1 - MPC)
= 1 / ( 1 - 0.8)
= 5
The change in GDP is therefore:
= 8 billion x 5
= $40 billion
If the MPC is 0.67, the multiplier is:
= 1 / ( 1 - 0.67)
= 3.03
The change in GDP would be:
= 8 billion x 3.03
= $24.24 billion
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