Three students determine whether the graph has symmetry. Who's correct?
Explain your reasoning.

Randall:
The graph has no symmetry.
When I look at the x-values I and
-1, the y-values are not the same,
so there isn't any symmetry
about the y-axis. When I look at
the y-values 8 and -8, the
x-values are not the same, so
there isn't symmetry about
the x-axis.
Olivia:
The graph has no symmetry.
If I reflect the graph across
the x- or y-axis, it is not a
mirror image.
Shedrick:
There is some type of symmetry. The points (2, 8) and (-2, -8) are
on the graph. Likewise, the points
(1, 1) and (-1,-1) are on the graph. There is a reflection of the points across the x- and y-axis.