Imagine the economy is defined by the consumption function of C = 140 + 0.9 (Yd) where 140 is autonomous consumption, 0.9 is marginal propensity to consume, and Yd is disposable income (after taxes) and Yd=Y-T, where Y is national income (or GDP) and T=Tax Revenues=0.3Y (0.3 is the avg. income tax rate). To find the macro equilibrium use the following equation Y = C + I + G + (X - M). Where C=140 + 0.9(Yd), I=400, G=800, X=600, M=0.15Y. What is the aggregate expenditure for this economy? [Remember Y=AE]

Y = 3079
Y = 4042
Y = 3730
Suppose an economy is defined by the following: C = 210 + 0.8 (Yd). This algebraic equation represents the .

consumption function
autonomous consumption
marginal propensity to consume