Is this problem designed to make my head hurt? (5lb. book Ch. 22 #25)

Not sure if there is a lack in my foundation or if this is a poorly written question. I spent the last 20 mins googling explanations to this question and I, somehow, can’t seem to dumb it down for myself.

Thoughts, anyone?

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Hi, I was just going to post the same question. Did you find an explanation? Also I don’t think the graph is related to the question.

Yes, sorry about that, fixed it. I didn’t find a convincing explanation, just gonna abandon it or come back to it later. Maybe my head is not working right at the moment.

You can check out some of the comments in this link, the one by Vince Kotchian seems good: https://www.reddit.com/r/GRE/comments/bwvkk9/math_people_please_simplify_this_for_me_i_read/