An **even function **exists when for all values of x.

The graph of an **even function **must be symmetrical about the y-axis.

Examples of **even functions **have been listed below:

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An **odd function** exists when for all values of x.

Graphs of **odd functions **should have 180 degrees rotational symmetry about the origin (0,0).

Examples of **odd functions **are listed below:

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Most functions are neither even or odd.

An example of a function that is neither even or odd would be: