Determine Whether the Given Function Is Exponential or Not $\begin{array}{rl}\hline x & H(x) \\\hline-1 & 3 \\0 & 7 \\1 & 11 \\2 & 15 \\3 & 19\end{array}$

Multiple Choice

Determine whether the given function is exponential or not. If it is exponential, identify the value of the base a.
- $\begin{array}{rl}\hline x & H(x) \\\hline-1 & 3 \\0 & 7 \\1 & 11 \\2 & 15 \\3 & 19\end{array}$

A) Exponential; $a = 3$
B) Exponential; $a = 4$
C) Exponential; $a = 7$
D) Not exponential