Answer
See the explanation below.
Work Step by Step
The complete and correct statements are:
$a^2=25$, therefore the y-intercepts are 5 and -5. Thus, the graph passes through the points (0,5) and (0,-5), which are vertices.
$b^2=9$, therefore the y-intercepts are 3 and -3. Thus, the graph passes through the points (0,3) and (0,-3), which are vertices.
