I just did the same exam and the wording is unbelievable and they expect you to get it right..like 12% got this question right because of the wording my god..it says there are 6 sections inbetween two flagpoles 100km apart. so you find the sum with solve or transpose as 100 for the sum and find a because it asks for the length of the first section. i drew the poles and six sections as in dots so it became 7 spaces inbetween so i used n=7 while it should've been 6 because apparently sections means spaces ;( Also lost another 2 marks because it asked whats the best toll to use at what time and i wrote toll A for up to 10 sections and B for the remainder but only one toll can be used because its for a single trip so the answer is toll A if the motorist is going up to 10 sections and B if it's over 10 ;( if i lose marks for wording tomorrow im going to cry..also it asked for the general trend of the graph i wrote "theres a generally upward secular trend" and in assessment report its "an increasing trend", it doesnt look seasonal at all its going up pretty well..what do i do? lol