John,
Bob answered your question.
I took the exam a few months ago and struggled with those questions as well. If you calculate them then you get the average heading, however if you measure them at the start of the plot then you get the initial heading. Initial being the key word in the question.
Good luck.
It wasn't as bad as I had feared. I finished the exam with time to spare and was able to do the entire exam again twice before I submitted just to be sure about my passing. I got somewhere in the mid 90s.