How to draw graphs and display them in a document?

Question

.NET

Hello.
It is required to make a desktop application in WPF that does mathematical calculations, draws graphs and spit out a report according to a given template. There are no problems with the first and third ones.
The problem is only in drawing function graphs and how to push these graphs into a template (.docx, .pdf).
Are there any libraries, articles, built-in tools for .NET/WPF? It was much easier on the Web. I don't know how to do it.
Example:

Answer 1

I made a coordinate grid on Canvas and draw whatever you want, then saving it as an image and putting it into a document is not a problem.
for Excel - epplus, for Word - DocX

Answer 2

You draw graphics with this thing . She can export both to .pdf and to a picture. To insert a picture into .docx, use this example.