Hi Everyone in this video I explain why we take the MRS (Marginal Rate of Substitution) to be equal to the absolute value or the negative of our Indifference Curve. 0:00 Introduction 0:33 Reviewing Slopes 2:41 Slope of an Indifference Curve 4:57 Interpreting the slope of an Indifference Curve as MRS 6:05 Second example Finding the Slope / MRS as the ratio of MUx/MUy: • Why MRS = MUx/MUy (Equation for Marginal R...