Final answer:
The preferences of a consumer over consumption and leisure are represented by a utility function, which illustrates satisfaction or utility derived from various choices made within their budget constraints.
Step-by-step explanation:
The preferences of the representative consumer over consumption and leisure are represented by the use of a utility function. An utility function reflects the level of satisfaction or happiness that a consumer derives from consuming goods and services, and it is used to demonstrate how consumption and leisure relate to overall well-being. Individuals may make choices to maximize their utility given their preferences and budget constraints, as illustrated in various economic models including those that consider intertemporal choices and the trade-off between consumption and leisure.