GCSE · Functions

Function notationExam-style questions

Why f(x) is a machine's output, not a multiplication — evaluating f(3), reading f(x) = k as an equation to solve, and keeping inputs and outputs straight.

Start practising Read the lesson

11 questions · GCSE (Higher) level · mark scheme and worked solution on each · no sign-up to try

DifficultyAll Level 2 Level 3 Level 4 Level 5

1
$f(x) = 4x + 1$

(a) Work out $f(3)$

(b) Work out $f(-1)$

(c) Solve $f(x) = 29$
Level 2 · 4 marksTry it