difference quotient


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difference quotient

[′dif·rəns ‚kwō·shənt]
(mathematics)
The increment of the value of a function divided by the increment of the independent variable; for the function y = ƒ(x), it is Δ yx = [ƒ(x + Δ x) - ƒ(x)]Δ x, where Δ x and Δ y are the increments of x and y.