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.

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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
$f(x) = 2x - 3$ and $g(x) = x + 4$

(a) Solve $f(x) = g(x)$

(b) The graphs of $y = f(x)$ and $y = g(x)$ are drawn on the same axes. What does your answer to part (a) tell you about the two graphs?
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