if it's on standard position, it means is "stemming" from the origin and goes up to 8,9 then
that simply means [tex]\bf \begin{array}{llll}
8&,&9\\
\uparrow &&\uparrow \\
x&&y
\end{array}\qquad \theta=tan^{-1}\left( \cfrac{y}{x} \right)\implies \theta=tan^{-1}\left( \cfrac{9}{8} \right)[/tex]
