Assume the following model of the economy Y =C+I+G  C = 120 + 0.5 (Y-T) I= 100 -10r G = 50 T=40   Derive the equation for the IS curve, showing Y as a function of r alone. Solve for the value of Y when r=10%, r=15%, r=20%

Economics:
10th Edition
ISBN:9781285859460
Author:BOYES, William
Publisher:BOYES, William
Chapter9: Aggregate Expenditures
Section: Chapter Questions
Problem 12E
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Assume the following model of the economy

Y =C+I+G

 C = 120 + 0.5 (Y-T)

I= 100 -10r

G = 50

T=40

 

  1. Derive the equation for the IS curve, showing Y as a function of r alone.
  2. Solve for the value of Y when r=10%, r=15%, r=20%
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