A rule for creating a "y" output from an "x" input. For example, the y value of the function f(x) = 15x is 30 if x is 2.
Mathematical-function Sentence Examples
The mathematical function log x or log x is one of the small group of transcendental functions, consisting only of the circular functions (direct and inverse) sin x, cos x, &c., arc sin x or sin-' x,&c., log x and e x which are universally treated in analysis as known functions.
The theory of utility above referred to, namely, that the degree of utility of a commodity is some continuous mathematical function of the quantity of the coin modity available, together with the implied doctrine that economics is essentially a mathematical science, took more definite form in a paper on "A General Mathematical Theory of Political Economy," written for the British Association in 1862.