Question

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

$x$	$6$	$8$	$10$	__
$y$	$15$	$20$	__	$40$

Answer 1

Fro column $2$ and $3$-

$y=\frac{5}{2}x\Rightarrow x=\frac{2}{5}y$

Therefore,

For $x=10\Rightarrow y=\frac{5}{2}\times 10=25$

For $y=40\Rightarrow x=\frac{2}{5}\times 40=16$