The relationship between consumer expenditure and disposable income.

the relationship between disposable income and consumption

The consumption function is the functional relationship between consumption expenditure and disposable income, ceteris paribus.

A term used to describe a relationship between consumer expenditures and all the influences that determine them.

John Maynard Keynes developed a mathematical function to express consumer spending as one term called the "consumption function". In economics, the consumption function calculates the amount of total consumption in an economy. It is made up of autonomous consumption that is not influenced by current income and induced consumption that is influenced by the economy's income level.