Answer
See graph
Work Step by Step
Given \begin{equation}
y=-0.3(x-7)^2+30.
\end{equation} This is an equation of a parabola in standard vertex form. Let's determine the vertex so that we can mark it on the graph. The $x$ and $y$ of the vertex are found from the function.
\begin{equation}
\begin{aligned}
x&=7\\
y&=30.
\end{aligned}
\end{equation} The vertex is $(7,30)$.
The graph of the function is shown in the figure below with the horizontal and vertical intercepts labelled. The vertex is also labelled.
