Answer:
increase in equilibrium Y in the Keynesian AE model = 500
Step-by-step explanation:
Formula AE Model = ΔY = 1/1-C * ΔG
Where ΔY = Change in National Income
Marginal Propensity to Consume =0.80
Change in government spending =100
ΔY = 1/1-0.8*100 = 1/0.2*100 = 5*100 = 500