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Direct and Inverse Proportions — MATHS STD 8 — Question

Gujarat BoardEnglish MediumSTD 8MATHSDirect and Inverse Proportions1 Mark
MCQ
If $x$ and $y$ are inversely proportional, then:
  • A
    $\text{x + y = constant}$
  • B
    $\text{x} - \text{y = constant}$
  • ✓
    $\text{xy = constant}$
  • D
    $\frac{\text{x}}{\text{y}}=\text{constant}$
✓

Answer

Correct option: C.
$\text{xy = constant}$
$\text{x}∝\frac{1}{\text{y}}$
$\text{x}=\frac{\text{k}}{\text{y}}$
$\text{x}=\text{ky}$
Where $k$ is a constant.

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