Linked from
The 36 pages that link to Finite difference, each with the reason it gives.
Sensitivity analysisRelated: It estimates sensitivity when analytic derivatives are unavailable.
Arithmetic progressionRelated: The first differences of an arithmetic progression are all equal.
Secant lineRelated: A finite-difference quotient is the numerical counterpart of a secant slope.
Falling factorialRelated: Finite differences lower the order of falling factorials in a simple way.
Abel's inequalityRelated: The transformed sum contains differences of adjacent weights.