Ah, thanks! Sorry about the title, I should have included both Parametric and Cartesian. The issue I had with the parametric was as you alluded to, I actually didn't know where to start (hence the query was vague).
Thanks a lot! :)
I'm volunteering in a summer school for year 12 students in my area, and have to teach them a few topics. I've been struggling to get the parametric equations from this.
Sketch: |z| = \arg(z)
So I thought that the obvious way to explain it to them would be to say: "that as the magnitude of...