Answer
$21$, $4n+1$
Work Step by Step
Let $n$ be input and $y$ be output.
From the given table we notice that the pattern is the following:
$$y = 4n + 1$$
We calculate the output for $n = 5$:
$$y=4(5)+1=21$$
Now we complete the table:
\[
\begin{array}{|c|c|}
\hline
\textbf{Input} & \textbf{Output}\\ \hline
1& 5 \\ \hline
2 & 9\\ \hline
3 & 13 \\ \hline
4 & 17 \\ \hline
5 & 21 \\ \hline
: & : \\ \hline
n & 4n+1 \\ \hline
\end{array}
\]
