Information and IdeasMediumDescribing a rising series
Information and Ideas practice question
Share of a country's electricity generated from wind:
2010: 4%
2015: 9%
2020: 17%
2025: 24%
Which choice most accurately completes the statement? 'Between 2010 and 2025, the share of electricity from wind ____'
- A. rose in every five-year period shown, reaching six times its 2010 level by 2025.Correct
- B. doubled in every five-year period shown.
- C. rose fastest between 2010 and 2015.
- D. fell between 2020 and 2025.
Answer: A. rose in every five-year period shown, reaching six times its 2010 level by 2025.
4 → 9 → 17 → 24 rises every period, and 24 is six times 4.
Why the other answers are wrong
- B. doubled in every five-year period shown.
- 9 to 17 and 17 to 24 are each less than doubling.
- C. rose fastest between 2010 and 2015.
- The largest rise is 2015 to 2020 (8 points); 2010 to 2015 rose 5 points.
- D. fell between 2020 and 2025.
- 17 to 24 is a rise, not a fall.
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