Is the relationship between changes in spending and changes in real GDP in the multiplier effect a direction (positive) relationship or is it an inverse (negative) relation- ship?

Explain in technical details why the Lagrange multiplier is currently used in analyzing the theory of the consumer

Describe the phenomenon of the multiplier effect?

Q1: There are two equations for macroeconomic equilibrium in an economy. State them. Show (mathematically) that Savings equals Investment when expenditure equals income. What type of economy would you have when exports equal imports? What happens to the savings-investment relationship if exports are not equal to imports? [This can be greater than or less than]. [Hint: See video lecture on Open Economy Macroeconomics]. Note: Ensure to write out full meanings when you use abbreviations or short forms. This is key to getting full marks.