Looking at the graph I think it's very easy to guess that Joel was the one on the bottom and Zoran was almost evicted. During the half an hour the lines were open from the graph being shown to lines closing, the gap between Bodie and Zoran went from 14% to 5%, if only he survived.
I have always looked at Big Brother housemates in four different categories in terms of what votes they receive and how many. And this specific graph with these specific nominees helps show that visually.
The first type of housemate I would say is someone who is genuinely disliked by the audience, getting low save votes and high evict votes, very unlikely to ever survive an eviction and will never win. These are housemates like TJ, Kate and maybe someone like a Karen even. Maybe even a Tully?
Next is the type of housemate who the audience just does not care about, they are barley shown in the daily shows or are just uninteresting. They would attract low votes to save and low votes to evict and depending on the system would either last a decent while or go very early. I see people like Zoran, Elise, Peter or Patrick fit into this category.
Then there is also the type of housemate who are universally loved, people who are clear shots to win and will always do well. People that get high save votes and low evict votes. A really hard feat to not only achieve but to also maintain across the entire season but possible. The obvious answer is someone like Reggie and Joel shown here
Then finally you have the polarising housemates, who dominate airtime and divide viewers. They get high votes to evict and high votes to save and also depending on the system used will either go early or last a while. Bodie obviously being one of these housemates. There are people like Nathan, Michael and Katie as well as Bodie who all may have lasted longer had vote to save been used. Then, there are also people like Estelle, Tim and Tahan who all may have been early evictees had vote to evict been used.
So that then poses the question, which is better? I think the obvious answer is vote to save. You have idiot teenagers who spent their pocket money voting for this show, vote out the ones they get annoyed with and then complain when the show would get boring.