A **point plotter** (or **point grapher** or **coordinates 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 coordinates** or the **polar coordinates**.

In addition to plotting points (x_{n}, y_{n}) in the **Cartesian coordinate system** this **point 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**.

Furthermore, utilizing the most sophisticated **Cartesian** and **polar** **coordinate systems**, this **point plotter** is the only **Cartesian** and **polar** **coordinates grapher** that enables you to **rotate** any of the coordinate axes and graph coordinates in *non-orthogonal* **Cartesian** and *generalized* **polar** **coordinate systems**.

**pi**is replaced by**π**.

*You can use your mouse to Rotate Axis, Translate and Change Scale*

In addition to inputting data – by first pressing the ⚙ (gear) button – you can use your mouse to perform some functionality unique to this **interactive points grapher** 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 systems coordinate system. Click again to release the axis. - 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.

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To copy or save graphs right click on the image of a saved graph below and select "Copy image" or "Save image" from the pop-up menu.