[QUOTE=Frosty;9461659]That's one of 40 questions on the test that they get 35 minutes to complete. The final 10 are challenge questions where they get extra points if they complete them. That question was the final challenge question.
Here is a link to the test if you are interested:
http://www.wamath.net/contests/Mathi...IC03_78Reg.pdf
If I had graphed out that question, it would have been more obvious how to tackle it.[/QUOTE]
Sketches really help more often than not. Your wife should incorporate sketches into her teaching.
Sketch or no sketch, that isn't a one or two minute problem, at least for me.