Of course you may Quazars.
I used GeoGebra. It is a free download.
Just muck around with it and you will slowly get the idea. It is not very intuitive I am afraid but it is not impossible either.
I do not know how to use it very well. It is quite powerful. I'm slowly getting better with it.
I only worked out how to do number lines a short time ago.
download it and start playing - That is my advice. It is fun.
Oh - And thank you Rosala 