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temporecommodi

For the first option, the dot's size in year 2007 and 2011 looks equal, doesn't it?
Yes, the dot sizes in 2007 and 2011 do look similar, but the size in 2007 is just a little bit bigger. On the actual exam, you won't encounter such a close comparison between dot sizes. The difference will typically be clearer, making it easier to identify.
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Do they provide a scale (to compare circle sizes) in such graphs?
Bunuel

Yes, the dot sizes in 2007 and 2011 do look similar, but the size in 2007 is just a little bit bigger. On the actual exam, you won't encounter such a close comparison between dot sizes. The difference will typically be clearer, making it easier to identify.
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Do they provide a scale (to compare circle sizes) in such graphs?


No. You evaluate it visually.
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