One of the things I loved about Reddit was the super niche experts dropping into the comment section. I’m so glad Lemmy has this too.

I clicked that link and the first dozen results were Reddit posts and garbage

To answer your question without being a dickhead: The given x indicates the point on the curve you need to find the slope at. In other words, find the derivative and then evaluate that function at the given x.

“Introductions and a bit of smalltalk” - I would shit myself if an interviewer started asking about smalltalk… /s