Looking for free graphing calculator for two-variable inequality

[Hornbein]

TL;DR

Looking for free graphing calculator for two-variable inequality.

I have a two-variable inequality and wish to make a graph of the regions in which it is satisfied. Is any such took available online for free?

A great many free online graphing calculators are available, but I expect the great majority won't do what I want.

Specifically I want to find the regions in which (1-b)/(1-b/2) < a is true, with a and b being probabilities.

Alternatively, if someone has such a tool and can post the graph here that would be nice.

 

[fresh_42]

Have you checked what I have listed in
https://www.physicsforums.com/threa...h-physics-earth-and-other-curiosities.970262/ ?

I use locally GeoGebra
http://www.geogebra.org/

Graph
https://www.padowan.dk/

MatheGrafix
https://www.mathegrafix.de/

 

[Hornbein]

GeoGebra did the trick with ease. Thanks a ton!

(I hate shopping for "free" software.)

 

[fresh_42]

GeoGebra did the trick with ease. Thanks a ton!

(I hate shopping for "free" software.)

It's difficult, some are better, others not, and some require too much practice to use properly. I used them for my challenge threads when I needed a graphic and mspaint is rather limited. Buying software for, say 4 graphics per year is not really an option.

 

[MidgetDwarf]

You can download HP prime for desktop use, I believe, for free.