kmplot software package provides mathematical function plotter for KDE, you can install in your Debian 7 (Wheezy) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install kmplot
kmplot is installed in your system.
Make ensure the kmplot package were installed using the commands given below,
$ sudo dpkg-query -l | grep kmplot *
You will get with kmplot package name, version, architecture and description in a table
| Distro | Debian 7 wheezy |
| Section | Mathematics |
| Package | kmplot |
| Version | 4:4.8.4-2 |
| Description | mathematical function plotter for KDE |
| Sub Section | math |