Find inverse proportionaly constant if $x$ and $y$ are in inverse proportion.
$x$ $9$ $6$ $3$ $18$
$y$ $2$ $3$ $6$ $1$

9

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18

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27

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30

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Solution

The correct option is D $18$
$∵ x$ and $y$ are inverse porportion
$∴ x \times y = k \Rightarrow 9 \times 2 = 6 \times 3 = 3 \times 6 = 18 \times 1 = 18 = k$

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