Answer
Sample answer:
$[-0.5,0.5]$ by $[-0.5,0.5]$
Work Step by Step
Graphed with desmos.com/calculator.
Zoom out first, to see the features of the graph.
Then, adjust window borders.
All the main features of the graph (maxima, minima, intercepts, end behavior) should be shown, and not too much area should be "wasted".