Suppose $f''(x)$ is continuous for all $x$, and the graph of $y = f(x)$ has an inflection point at $x = 6$.
Complete the following table with appropriate possibilities for the values of $f''(x)$ at $x = 4, 6, and 14$.
\begin{tabular}{|c|c|c|c|}
\hline
x & 4 & 6 & 14 \\
\hline
$f''(x)$ & & & \\
\hline
\end{tabular}
Based on your table, the graph of $y = f(x)$ is until $x = 6$, and is after.
The graph of $y = f(x)$ will have a at $x = 6.$