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CTET PAPER II 2018 · PYQ · Direct and Inverse Proportion · easy

If two quantities x and y vary inversely with each other, then which one of the following is true?

  1. A.Ratio of their corresponding values remains constant.
  2. B.Product of their corresponding values remains constant.✓ Correct
  3. C.Summation of their corresponding values remains constant.
  4. D.Difference of their corresponding values remains constant.

Explanation

In inverse proportion (inverse variation), the product of two quantities remains constant. If x and y vary inversely, then xy = k (constant). As one quantity increases, the other decreases proportionally such that their product stays the same. In direct variation, it's the ratio that remains constant.
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