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Two quantities x and y are in inverse proportion when:
Ax times y stays constant
Bx/y stays constant
Cx + y stays constant
Dx - y stays constant
Answer & Solution
Correct answer: A. x times y stays constant
1. As one rises the other falls in proportion.
2. The product xy equals a constant k.
3. Speed and time for a fixed distance behave this way.
_Source: NCERT Class 8 Mathematics, Chapter 13, Direct and Inverse Proportions._
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