Multiple choice A.decreases as GDP increases b.increases as GDP increases c.is $40 billion at all levels of GDP d.is $60 billion at all levels of GDP

$200 Ctlg 180 160 C 140 120 Aggregate Expenditures (Billions) 100 80 60 40 20 45 0 $20 40 60 80 100 120 140 160 180 200 Real GDP (Billions) Refer to the diagram for a private closed economy. In this economy, investment