#### Answer

The constant of variation is $30$.
The inverse variation equation is $y=\frac{30}{x}$.

#### Work Step by Step

$y=\frac{k}{x}$
$y=6; x=5$
$6=\frac{k}{(5)}$
$6\times5=k$
$30=k$
The constant of variation is $30$.
The inverse variation equation is $y=\frac{30}{x}$.