Functions (AQA GCSE Maths): Flashcards

A relationship that takes an input, processes it using a rule, and produces an output

Writing functions as $f(x) = ...$, e.g., $f(x) = 5x + 2$

Writing functions as $f: x → ...$, e.g., $f: x → 5x + 2$

Finding the output when you substitute a specific input value

Combining two functions by applying one to the output of another

Function $g$ is applied first, then $f$ to the result

No, order matters in composite functions

A function that reverses the operation of the original function

Write out the equation $x = f(y)$

If $f(a) = b$, then $f^{-1}(b)$ should equal $a$