For the consumer to reach equilibrium under indifference curve analysis
1
MRSxy = Px/Py and MRSxy must be increasing.
2
MRSxy = Py/Px and MRSxy must be increasing.
3
MRSxy = Py/Px and MRSxy must be constant.
4
MRSxy = Px/Py and MRSxy must be diminishing.