## Mapping Diagrams and Graphs of Functions

Consider some function $y=f(x)$. A standard graph has a horizontal axis for the independent variable
($x$) and a vertical axis for the dependent variable ($y$).
Points are plotted to show $(x,f(x))$ pairs. In a *mapping diagram*
the $x$ and $y$ axes are
parallel. Ordered pairs are plotted as arrows from an $x$ value on the
left number line to the corresponding $y$ value on the right axis.

### What you can try

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bic
Oct 2, 2015