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Information and IdeasMediumDescribing a series with a dip

Information and Ideas practice question

Number of bird species recorded in a survey plot: 2016: 42 2018: 45 2020: 39 2022: 47

Which statement is best supported by the data?

  1. A. The count fell between 2018 and 2020 but reached its highest level in 2022.Correct
  2. B. The count rose in every survey after 2016.
  3. C. The count was highest in 2018.
  4. D. The count fell steadily after 2016.

Answer: A. The count fell between 2018 and 2020 but reached its highest level in 2022.

45 → 39 is a fall; 47 in 2022 is the highest of the four.

Why the other answers are wrong

B. The count rose in every survey after 2016.
2020's 39 is a fall from 45.
C. The count was highest in 2018.
2022's 47 is higher than 2018's 45.
D. The count fell steadily after 2016.
The count rose in 2018 and again in 2022.

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