Any other tips on how to look professional in the eyes of an examiner @Sine?
Just quickly a few I think are important.
-Generally being neat with your working out, make sure the assessor doesn't have to look for your answer - However I do despise boxed answers/highlighting/underlines (just make it a logical path towards the answer imo)
-Being clear - so if you aren't sure if you have answered the question directly just add in a sentence directly answering the question with your answer.
-Draw asymptotes properly they usually won't bee too harsh but heaps of people touch the line, curve away from the line.
-If you change anything from the question or bring anything new in make sure to define it. (e.g. y = f(x))
-Using legends although this is more for spec (complex regions have a key stating a shaded region and naming it "region required".
-Show that questions move from one side LHS and work through that until you get to the RHS (or you can go from LHS = X then come from the other side RHS =x then state LHS =RHS.
-If you use any uncommon things (in methods) make a note of it e.g. If you use |x| = squareroot(x^2)
-Also neat graphs - so don't make it furry by going over it more than once, don't have any kinks, if you rub anything out make sure you don't smudge.
These things may or may not result in a loss of a mark (depending on how harsh the assessor are) - If it's an easier exam it's more likely that they will be harsh.