[Uses the Indifference Curve Approach] The appendix to this chapter states that when a consumer is buying the optimal combination of two goods x and y, then MRSy,x = Px/ Py. Draw a graph, with an indifference curve and a budget line, and with the quantity of y on the vertical axis, to illustrate the case where the consumer is buying a combination on his budget line for which MRSy,x > Px/Py.