Find equilibrium Y when C = 100 + 0.5Y and I = 1,000.
2,200
Equilibrium is struck when:
AS = AD
Or, when Y = C + I
Substituting the values of C and I, we get :
Y = 100 + 0.5Y + 1,000
Or Y - 0.5Y = 100 + 1,000
Or, 0.5Y = 1,100
∴ Y=1,1000.5=2,200.