Md = 0.14Y – 2400r ，I = 112 – 800r，AE = 670 + I + 0.5Y
画出货币供给/需求曲线，总支出/GDP，投资的边际效率的图像，表明Y和货币在货币供给/需求上的截距，AE的截距，以及对于MEI德投资的截距。（Draw the Money Demand/Supply, MEI, and AE/Y diagrams, carefully labeling Money intercepts for Money Supply and Demand, the Aggregate Expenditure intercept, and the Investment intercept for Marginal Efficiency of Investment.）
急~~~~~谢谢！