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Dropdown 1: 25% more
Dropdown 2: Between 2005 and 2006
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
95%
(hard)
Question Stats:
51% (03:11) correct
49%
(02:59)
wrong
based on 453
sessions
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Not Attempted Yet
The graph above shows wheat production in million metric tons (blue bars) and yield in metric tons per hectare (orange line) for a country from 2000 through 2010.
From each drop-down menu, select the option that creates the most accurate statement based on the information provided.
The total land under wheat in 2003 was approximately than that in 2002.
The largest percentage drop in yield per hectare was .
Attachment:
23.jpg [ 87.44 KiB | Viewed 5272 times ]
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Official Answer
Dropdown 1: 25% more
Dropdown 2: Between 2005 and 2006
Bunuel
Official Solution:
Drop-down 1:
To calculate the land area under wheat, we divide wheat production by yield per hectare, since \(\text{land}=\frac{\text{production}}{\text{yield}}\). For 2002, this is approximately \(\frac{2.9}{1.5} \approx 1.9\), and for 2003, it is approximately \(\frac{5.8}{2.4} \approx 2.4\). The increase from 1.9 to 2.4 is about 25%, so the land under wheat in 2003 was approximately 25% more than that in 2002.
Drop-down 2:
Largest percentage drop means the largest proportional decrease from one year to the next, that is, (previous yield - new yield)/(previous yield). The biggest proportional decline occurs between 2005 and 2006, where yield falls from a little over 2 to about 1.2, which is the largest relative drop.
Correct answer:
Dropdown 1: "25% more"
Dropdown 2: "Between 2005 and 2006"
21 Nov 2024, 23:55
Kudos
Bookmarks
Bunuel - I got confused by the markings the right hand side's y-axis. They are not equally spaced. This prevented me from extracting numbers in time.
Any thought on such discrepancies and how to look at them?
Also - the approximations you've done(wrt calculations), are you approximating numbers in head using the concepts from NT or using calculator?
Calc will take more time but wouldn't want to go too far in approximations.
Any way I can get better at approximations?
Thanks.
Any thought on such discrepancies and how to look at them?
Also - the approximations you've done(wrt calculations), are you approximating numbers in head using the concepts from NT or using calculator?
Calc will take more time but wouldn't want to go too far in approximations.
Any way I can get better at approximations?
Thanks.
