[tex]\bf \qquad \qquad \textit{inverse proportional variation}
\\\\
\textit{\underline{y} varies inversely with \underline{x}}\qquad \qquad y=\cfrac{k}{x}\impliedby
\begin{array}{llll}
k=constant\ of\\
\qquad variation
\end{array}\\\\
-------------------------------\\\\
\textit{we also know that }
\begin{cases}
x=1.2\\
y=3
\end{cases}\implies 3=\cfrac{k}{1.2}\implies 3(1.2)=k
\\\\\\
3.6=k\qquad therefore\qquad y=\cfrac{3.6}{x}[/tex]
