Stretches (Edexcel A-Level Mathematics): Quizzes

$y = af(x)$

$|a| > 1$

Further away from the x-axis

$y = f\left(\frac{x}{b}\right)$

$|b| > 1$

Away from the y-axis

Vertical stretch by factor 2

Horizontal stretch by factor 2

Increases from 1 to 3

Output (y-values) vs input (x-values)