Answer
The constant of variation is $1.3$.
The variation equation is $y=\frac{1.3}{x^2}$.
Work Step by Step
$y=\frac{k}{x^2}$
$y=0.052; x=5$
$0.052=\frac{k}{5^2}$
$0.052=\frac{k}{25}$
$k=1.3$
$y=\frac{1.3}{x^2}$
The constant of variation is $1.3$.
The variation equation is $y=\frac{1.3}{x^2}$.