Answer
See graph
Work Step by Step
$$\frac{y^2}{9}-\frac{x^2}{9}=1$$
This is a hyperbola with center (0,0). The y-intercepts are (0,3) and (0,-3).
The corners of the box are (3,3), (-3,3), (-3,-3), and (3,-3). Draw two asymptotes with dotted lines through the corners. Draw two smooth curves originating at (0,3) and (0,-3) that approach but do not intersect the dotted asymptotes.
