Does anyone have any experience with D3.js?

Question

I have an issue with my line graph and I can't understand what it is. I have tried a few different things but nothing works.

If I put a stack overflow link here would anyone be able to take a quick look.
If stack overflow is not allowed or is inconsistent I can add the code here

I would really appreciate it.

Answer 1

https://code.sololearn.com/WsvZp0L88U2W/?ref=app
https://code.sololearn.com/Wwb3QtwCmvdX/?ref=app