For general guidance on what is on topic here please see What topics can I ask about here?
To be honest, I don't think any how-to questions regarding Geogebra are on topic on this site. It is first and foremorst a mathematical tool. Some mathematical questions might be best answered in a visual way, yet that does not mean it is a graphic design problem.
I would imagine a question like "How to draw this in geogebra?" to be off-topic, since the output will be decided by a mathematical way of thinking, not a design one. Such questions would be better asked on mathematical fora, such as Math SE, or maybe on Computer Graphics. (Beware though that SE is not intended as a 'solve my homework' tool).
A question that could fit here would be: "What is the best way to present these line charts so that they fit my style guide, but remain clear and scientifically correct?" since that question requires a design way of thinking. The fact that a mathematical process led to the generation of the graphics bears no impact on the design problem of presentation.
I hope I am making myself clear? It is all about the inherent problem.
- Is it a mathematical one: not a good fit.
- Is it a design one: good fit.
- Is it a bit of both: ask away and let the community decide.