function notation
What function notation means in Mathematics GCSE, as defined for Pearson Edexcel.
Definitions of function notation
Exam boards and our study guides word this term in slightly different ways. Learn the version your board uses.
Check what you remember
Read the wording for your board, then hide it and explain function notation in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: Pearson Edexcel
The rule is written f(x), so if f(x) = 3x − 4 then f(5) = 11.
f(x) denotes the output of the function f for input x.
Topics that use function notation
- Algebra - Graphs (Pearson Edexcel GCSE)
- Algebra - Notation, vocabulary and manipulation (Pearson Edexcel GCSE)
Related terms
- monic quadratic
- algebraic equivalence
- algebraic notation
- algebraic proof
- area under a graph
- Asymptote
- Asymptotes
- axis of symmetry
Using function notation in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
Practise Mathematics questions
Create a free account to answer exam-style questions on this topic and get feedback on your answers.
A week of Premium from your first lesson · Then the free plan continues · No card, no charge