The value of a when x | y ----|---- 2 | 6 a | 18 9 | 27 is: 1. 1 2. 1.5 3. 9 4. 6

As And So, we can say x and y vary directly Hence, option 4 is the correct option.

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Mathematics

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As $\dfrac{2}{6} = \dfrac{1}{3}$

And $\dfrac{9}{27} = \dfrac{1}{3}$

So, we can say x and y vary directly

$\dfrac{2}{6} = \dfrac{a}{18}\\[1em] \Rightarrow a = \dfrac{2 \times 18}{6}\\[1em] \Rightarrow a = \dfrac{36}{6}\\[1em] \Rightarrow a = 6$

Hence, option 4 is the correct option.

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