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or each table, determine whether it shows that $x$ and $y$ are proportional.$\newline$$x$ and $y$ are proportional, fill in the blank with a number in simplest form.$\newline$\begin{tabular}{|c|c|c|c|c|c|c|c|c|c|}$\newline$\hline \multicolumn{$5$}{|c|}{ Table $1$} & \multicolumn{$5$}{|c|}{ Table $2$} \\$\newline$\hline$x$ & $15$ & $36$ & $63$ & $96$ & $x$ & $15$ & $30$ & $45$ & $60$ \\$\newline$\hline$y$ & $3$ & $6$ & $9$ & $12$ & $y$ & $6$ & $12$ & $18$ & $24$ \\$\newline$\hline \multicolumn{$5$}{|c|}{ Proportional } & \multicolumn{$5$}{|c|}{ Proportional } \\$\newline$\hline \multicolumn{$5$}{|c|}{$y$ is $\square$ times $x$} & \multicolumn{$5$}{|c|}{$y$ is $\square$ times $x$} \\$\newline$\hline \multicolumn{$5$}{|c|}{ Not proportional } & \multicolumn{$5$}{|c|}{ Not proportional } \\$\newline$\hline$\newline$\end{tabular}