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GATE 2024 MN – Question 8

General Aptitude · Analytical Aptitude: Logical Reasoning, Deduction and Analogy · 2 marks · Multiple choice

The plot below shows the relationship between the mortality risk of cardiovascular disease and the number of steps a person walks per day. Based on the data, which one of the following options is true?

Diagram for GATE 2024 MN question 8
  1. The risk reduction on increasing the steps/day from 0 to 10000 is less than the risk reduction on increasing the steps/day from 10000 to 20000.
  2. The risk reduction on increasing the steps/day from 0 to 5000 is less than the risk reduction on increasing the steps/day from 15000 to 20000.
  3. For any 5000 increment in steps/day the largest risk reduction occurs on going from 0 to 5000.
  4. For any 5000 increment in steps/day the largest risk reduction occurs on going from 15000 to 20000.

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Correct answer: (C) For any 5000 increment in steps/day the largest risk reduction occurs on going from 0 to 5000.

Explanation

Compare vertical decreases over equal horizontal intervals on the plotted curve. It falls rapidly near zero steps and then becomes progressively flatter, so the first 5000-step interval has the greatest fall in the displayed risk.

That is **C**. A and B reverse the early-versus-late comparison, and D assigns the largest fall to the flattest final interval. Exact unlabelled intermediate risk values are unnecessary; the curve's shape determines the comparison. This is interpretation of the supplied graph, without an additional claim that it proves causation.

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