A-Level Maths Edexcel (9MA0)

#1.2.9 Transformations of functions

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Understand the effect of simple transformations on the graph of y=f(x)y = f(x), including sketching associated graphs:
y=af(x)y = af(x), y=f(x)+ay = f(x) + a,
y=f(x+a)y = f(x + a), y=f(ax)y = f(ax),
and combinations of these transformations

Students should be able to find the graphs of y=∣f(x)∣y = |f(x)| and y=∣f(−x)∣y = |f(-x)|, given the graph of y=f(x)y = f(x).

Students should be able to apply a combination of these transformations to any of the functions in the A-Level specification (quadratics, cubics, quartics, reciprocal, ax2\frac{a}{x^2}, ∣x∣|x|, sin⁡x\sin{x}, cos⁡x\cos{x}, tan⁡x\tan{x}, exe^x and axa^x) and sketch the resulting graph.

Given the graph of y=f(x)y = f(x), students should be able to sketch the graph of, e.g.
y=2f(3x)y = 2f(3x), or y=f(−x)+1y = f(-x) + 1, and should be able to sketch (for example)
y=3+sin⁡2xy = 3 + \sin{2x}, y=−cos⁡(x+π4)y = -\cos{(x+\frac{\pi}{4})}