Functions are one of the most fundamental concepts in mathematics, forming the foundation for topics in algebra, calculus and many other areas. A solid understanding of the basics of functions, ...

A function is a rule or set of rules or instructions for changing one input number into another output number. Functions are written in function notation with the name of the function (usually f ...

Algebraic formulae - Edexcel Function notation – Higher Formulae are used in everyday life, from working out areas and volumes of shapes to converting units of measurement.