(1) The consumer acts rationally so as to maximise satisfaction.
(2) There are two goods X and Y.
(3) The consumer possesses complete information about the prices of the goods in the market.
(4) The prices of the two goods are given.
(5) The consumer’s tastes, habits and income remain the same throughout the analysis.
(6) He prefers more of X to less of У or more of Y to less of X.
(7) An indifference curve is negatively inclined sloping downward.