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Bunuel
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Shivam2024

Bunuel
Official Solution:
Bunuel



The chart shows Country X’s import and export figures (in billions of dollars) from 2010 to 2020. The blue line represents imports, and the orange line represents exports. A trade surplus occurs when exports exceed imports, while a trade deficit occurs when imports exceed exports. The difference between exports and imports is referred to as the balance of trade.

From each drop-down menu, select the option that creates the most accurate statement based on the information provided.


The greatest percentage increase in imports occurred during the period .


The range of the trade balance over the period 2010 to 2020 was .

Drop-down 1:

There’s no need to calculate percentage changes for every year. Notice that in 2010, the import figure was the lowest on the chart. The line from 2010 to 2011 is the steepest starting from the lowest base, which results in the greatest percentage increase. Although the increase from 2019 to 2020 is also steep, it starts from a higher base (the 2019 amount). Therefore, the greatest percentage increase in imports occurred during the period 2010–2011.

Drop-down 2:

To calculate the range of the trade balance, we need to find the difference between the highest trade balance and the lowest trade balance during the period. The highest trade balance occurred in 2018, equal to 2500 − 1700 = 800. The lowest trade balance occurred in 2011, equal to 1800 − 1700 = 100. Therefore, the range of the trade balance is 800 − 100 = 700.


Correct answer:

Dropdown 1: "2010–2011"

Dropdown 2: "700"
I don’t quite agree with the solution. % increase for period 2010-2011 is same as % increase for period 2019-20.

You should read the question and the solution more carefully. The years 2010–2011 and 2019–2020 had the same absolute increase in imports (400), but the question asks about percentage increase, which depends on the starting value.

2010–2011:

(1800 − 1400)/1400 = 400/1400 ≈ 29%

2019–2020:

(2200 − 1800)/1800 = 400/1800 ≈ 22%

So 2010–2011 had the greater percentage increase. The solution is correct.
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