Keywords: utilization function critique Consumption function can be an epoch making contribution to the various tools of economic examination analogous to but even more important than Marshall's breakthrough of demand function. Discuss ANS NO:-1 Consumption function can be explained as the partnership between use and income. Consumption = f (income) or C = f(y) Consumption expenditure boosts with increase in income. But increase ingestion is significantly less than increase in income. Consumption will not increase at the same rate as the income will. It is anticipated to psychological behaviour of the individuals. "As the income of men and women rises, their usage also rises. However the whole increase in income is not became consumption. A part of it is kept.