Question

Fill in the missing terms in the following tables, if $x$ and $y$ vary directly-

$x$	$6$	$8$	$12$	__
$y$	$18$	__	__	$63$

Answer 1

From $2^{nd}$ column,

$y=3x$

Therefore,

For $x=8\Rightarrow y=3\times 8=24$

For $x=12\Rightarrow y=3\times 12=36$

For $y=63\Rightarrow x=\frac{y}{3}=\frac{63}{3}=21$