Answer
See graph
Work Step by Step
Given \begin{equation}
y=3(4)^x.
\end{equation} This is an exponential function with no restriction on the domain. The domain is all real numbers. It only has a horizontal intercept with no vertical intercept.
\begin{equation}
\begin{aligned}
x&=0\\
y&= 3.
\end{aligned}
\end{equation} The graph of the function is shown in the figure below with the $y$-intercept labelled.
