In function graphing, a vertical translation is a related graph which, for every point (x, y); has a y value which differs from another graph, by exactly some constant c. For example, the antiderivatives of a family are vertical translations of each other.
See also:
Wikipedia (http://en.wikipedia.org/wiki/Main_Page)
Vertical_translation (http://en.wikipedia.org/wiki/Vertical_translation)
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