Topics: Interactivate: Scatter Plot - Shodor
gnuplot is a command-line program that can generate two- and three-dimensional plots of functions , data , and data fits. It is frequently used for publication-quality graphics as well as education. The program runs on all major computers and operating systems ( Linux , Unix , Microsoft Windows , macOS , and others). It is a program with a fairly long history, dating back to 1986. Despite its name, this software is not distributed under the GNU General Public License (GPL), but its own free software license. 
gnuplot can produce output directly on screen, or in many formats of graphics files, including Portable Network Graphics (PNG), Encapsulated PostScript (EPS), Scalable Vector Graphics (SVG), JPEG and many others. It is also capable of producing LaTeX code that can be included directly in LaTeX documents, making use of LaTeX's fonts and powerful formula notation abilities. The program can be used both interactively and in batch mode using scripts.
The gnuplot core code is programmed in C. Modular subsystems for output via Qt, wxWidgets, and LaTeX/TikZ/ConTeXt are written in C++ and Lua.