Answer
Refer to Graph I
Domain is {$x$ | $x \ge -9$}
Range is all real numbers of $y$
The graph is not a graph of function
Work Step by Step
Refer to Graph I for the graph of $x$ = $y^2$ - 9 (in black color).
The domain is {$x$ | $x \ge -9$}. and
the range is all real numbers of $y$.
By means of vertical line test (in red color), the graph is not a graph of function since at any x-value > -9, the line cuts the graph at more than one y-value.
