对下列每一个问题给出代数式回答，然后用语言解释你的答案背后的经济学。 a．投资对利率的反应的敏感程度如何

对下列每一个问题给出代数式回答，然后用语言解释你的答案背后的经济学。

a．投资对利率的反应的敏感程度如何影响总需求曲线的斜率？

b．货币需求对利率的反应的敏感程度如何影响总需求曲线的斜率？

c．边际消费倾向如何影响总需求对政府购买变动的反应程度？

Give an algebraic answer to each of the following questions. Then explain in words the economics that underlies your answer.

a．How does the sensitivity of investment to the interest rate affect the slope of the aggregate demand curve？

b．How does the sensitivity of money demand to the interest rate affect the slope of the aggregate demand curve？

c．How does the marginal propensity to consume affect the response of aggregate demand to changes in government purchases？