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

Amid the chaos of revolutionary France, one man’s mathematical obsession gave way to a calculation that now underpins much of ...

Completing quadratic graphs Example Complete the table for the equation y = x 2 4 x + 3 and draw its graph for values of x from –2 to 5.