How to Graph a Function in Excel. A mathematical function is a formula that takes an input, x, applies a set of calculations to it, and produces an output called y. By calculating a function at a ...

Learn how to use functions to represent translations, sketches, compressions and reflections of graphs with GCSE Bitesize Maths.

Functions The graph of f (x) = x 2 is the same as the graph of y = x 2. Writing graphs as functions in the form f (x) is useful when applying translations and reflections to graphs.