This is an IB maths AA Internal Assessment: please address the topic above or a

This is an IB maths AA Internal Assessment: please address the topic above or a modified topic of your choosing (if it will beget a better paper/make it easier).
I have attached an example for formatting, should you need it, as well as the criteria.
Please use a combination of diagrams, mathematical reasoning, and equations to address the topic when necessary. They do not have to be complex at all, but please provide thorough explanations.
Thank you very much for all your help.