MCQ
If $x$ and $y$ are inversely proportional, then:
  • A
    $x + y =$ constant
  • $xy =$ constant
  • C
    $x - y =$ constant
  • D
    $\frac{\text{x}}{\text{y}}=\text{constant}$

Answer

Correct option: B.
$xy =$ constant

$\text{x}\propto\frac{1}{\text{y}}$
$\text{x}=\frac{\text{k}}{\text{y}}$
$\text{xy}=\text{k}$
Where $k$ is a constant.

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