Definition

Marginal Changes

In economics, a marginal change quantifies the impact of a small, incremental adjustment to a variable. When two variables, xx and yy, are related by a function y=f(x)y = f(x), the marginal change is represented graphically by the slope of the function. For continuous functions, this change is precisely measured using the function's derivative. [1, 2] This use of derivatives is a standard technique for measuring marginal changes throughout all mathematical extensions in economic analysis. [3]

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Updated 2026-05-02

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