Fungsi Parameter

\begin{equation*}
\begin{split}
\frac {dy}{dx} & = \frac {\dfrac {dy}{dt}}{\dfrac {dx}{dt}} \\\\
\frac {dy}{dx} & = \frac {-10t}{10} \\\\
\frac {dy}{dx} & = -t \\\\
\frac {dy}{dx} & = -2
\end{split}
\end{equation*}