A **points plotter** is a **grapher** that plots a set of **points** in a coordinate system where the **coordinates** of the points are given by ordered pairs (a_{n}, b_{n}).

The components of the ordered pairs can be either the Cartesian or polar coordinates.

In addition to plotting points (x_{n}, y_{n}) in the **Cartesian coordinate system** this **points grapher** can be used to plot points (r_{n}, θ_{n}) in the **polar coordinate system** where the angle θ_{n} can be entered in **radians**, **degrees** or **grades**.

**pi**is replaced by**π**.

*Utilizing the most sophisticated Cartesian and polar coordinate systems, this coordinates plotter allows using your mouse to Rotate Axis, Translate the Origin and Change Scales*
(in addition to inputting data) as outlined below.

- Click on (or near) an axis and move your mouse. That will
**rotate the axis**. The graph(s) are re-drawn in the**non-orthogonal**(*non-perpendicular*) Cartesian or**generalized**polar coordinate system. Click again to release the axis. You can undo this by pressing the**Rest**under**Rotate Axes**panel. - Drag the mouse to
**move the coordinate system**together with the graphs. - Double-click in the canvas to
**move the origin**to where was clicked. - Hold down Alt key and click on an axis to
**change the scale (zoom in one direction)**; the point which was clicked will be labelled "1" (or "-1") and becomes the new unit for that axis.