In mathematics, an injective function is a function f that maps distinct elements to distinct elements; that is, f = f implies x₁ = x₂. In other words, every element of the function's codomain is the image of at most one element of its domain.

What is a one-to-one function example?

A one-to-one function is a function of which the answers never repeat. For example, the function f(x) = x + 1 is a one-to-one function because it produces a different answer for every input. ... An easy way to test whether a function is one-to-one or not is to apply the horizontal line test to its graph.

What is a 0ne to one function?

website feedback. One-to-One Function. A function for which every element of the range of the function corresponds to exactly one element of the domain. One-to-one is often written 1-1. Note: y = f(x) is a function if it passes the vertical line test.