Answer
$\begin{array}{|c|r|r|r|r|r|r|r|}
\hline
x & -3 & -2 & -1 & 0 & 1 & 2 & 3 \\
\hline
r(x) & 9.7808 & 16.849 & 29.025 & 50 & 86.133 & 148.38 & 255.6 \\
\hline
\end{array}$
Technology formula:$\quad 50*(1+1/3.2)$^$(2*x)$
Work Step by Step
If, in Excel, you place the x values in cells A2 to A8,
enter the formula in the row below, in cell B2:
$\begin{array}{|c|r|r|r|r|r|r|r|}
\hline
x & -3 & -2 & -1 & 0 & 1 & 2 & 3 \\
\hline
f(x) & =50*(1+1/3.2)\text{^}(2*A2) & & & & & & \\
\hline
\end{array}$
Copy-paste the fomula to the rest of the row.