Explanation:
The domain is the set of all allowed x inputs of a function.
The smallest x can get is x = -3 as shown by the left-most point.
The largest x can get is x = 2, though we can't actually reach this value due to the open hole at the right-most point.
The interval of all possible x values is [tex]-3 \le x < 2[/tex] which converts to the interval notation [-3, 2)
We use a square bracket to include the endpoint and a parenthesis to exclude the endpoint.
We can say "x is any number between -3 and 2, including -3 but excluding 2".