Reflections
Maths: Edexcel A Level Pure Maths, topic 2.7.1
Reflections
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Reflection in the x axis
- For a function y = f(x):
- y = -f(x) gives a reflection in the x axis
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Reflection in the y axis
- For a function y = f(x):
- y = f(-x) gives a reflection in the y axis
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Invariant points
- Invariant points are points that don’t change in a transformation (e.g reflection).
- (0, 1.5) is the invariant point shown in the above reflection.
Test yourself on Reflections
Which axis has the red line been reflected in to give the blue line?
Which axis has the red line been reflected in to give the blue line?