Answer
An equation for inverse variation is $xy = 45$.
Work Step by Step
Use the general form of an inverse variation equation:
$xy=k$
Substitute 6 for $x$ and 9 for $y$.
$6.9=k$
$k=45$
Substitute 45 for $k$ in $xy = k$.
An equation for the inverse variation is $xy = 45$.
