16Hit1600
Information and IdeasMediumDescribing a series correctly

Information and Ideas practice question

Number of active members of a running club: 2020: 45 2021: 60 2022: 60 2023: 75 2024: 70

Which statement is best supported by the data?

  1. A. Membership rose by 15 in 2021 and 2023, was unchanged in 2022, and fell by 5 in 2024.Correct
  2. B. Membership rose every year.
  3. C. Membership peaked in 2024.
  4. D. Membership fell between 2021 and 2022.

Answer: A. Membership rose by 15 in 2021 and 2023, was unchanged in 2022, and fell by 5 in 2024.

45 → 60 (+15), 60 → 60 (0), 60 → 75 (+15), 75 → 70 (−5).

Why the other answers are wrong

B. Membership rose every year.
2022 was flat and 2024 fell.
C. Membership peaked in 2024.
2023's 75 is the peak.
D. Membership fell between 2021 and 2022.
2021 to 2022 was unchanged.

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