A-Level Maths OCR B (MEI) (H640)

Understand the definition of a function, and be able to use the associated language.

A function is a mapping from the domain to the range such that for each $x$ in the domain, there is a unique $y$ in the range with $f(x) = y$. The range is the set of all possible values of $f(x)$.

Notation:

• Many-to-one, one-to-one, domain, range, $f:x→y$