NABTEB Mathematics 2025 Objective — Question 9

Question 9 of 60 from the National Business and Technical Examinations Board (NABTEB) Mathematics 2025 Objective paper, with the correct answer and a full explanation.

Given two quantities x and y such that when x increases, y decreases and vice versa, the two quantities are said to be

A. directly proportional
B. inversely proportionalCorrect
C. jointly proportional

Explanation

When one quantity increases while the other decreases, the relationship between them is said to be inverse (inversely proportional).

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