As a general rule, it is usual to create a mathematical function and generate its corresponding graphical representation from the values it takes. Well, this Quadr does just the opposite.
The way of using Quadr is as follows: you provide the different coordinates of the function and you get the function itself from that data; It also draws you the graphic representation.
For Quadr programmers it has a special interest, then, when downloading the program, they will find, in a text file, the source code (in C ++) of how this small, but practical, application is made.
You can free download Quadr 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.