GCSE Maths (Edexcel)

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Function Notation

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Algebra Notation, Vocabulary and Manipulation

Function Notation

2:42 Functions
Spec A7
Previous Proofs Next Functions as Algebraic Expressions
  • A function is a relation between an input and output value
  • Functions can be thought of as mappings from input values to output values
  • The set of inputs to the function is called the domain
  • The set of outputs of the function is called the range
  • Functions can be represented using function notation, such as f(x) or g(x)
  • The expression inside the brackets represents the input
  • The function describes what operations to perform on the input
  • Alternative notation, such as f: x ->, is sometimes used to represent functions

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