#### Answer

Refer to Graph I
Domain is {$x$ | $x \ge 4$}
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 $x$ = $y^2$ + 4 (in black color).
The domain is {$x$ | $x \ge 4$}. 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 > 4, the line cuts the graph at more than one y-value.