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To solve this question, you need to look at the graph and identify the two endpoints of the interval. The endpoints are the blue dots on the number line. The first dot is at -3 and the second dot is at 2. These are the values that define the range of the set.
Next, you need to decide if the endpoints are open or closed. This depends on whether the dots are hollow or solid. A hollow dot means that the endpoint is not part of the set, and a solid dot means that it is. In this case, both dots are solid, so both endpoints are closed.
Finally, you need to write the interval notation using brackets and commas. The general form is [a, b], where a is the lower endpoint and b is the higher endpoint. For this question, a is -3 and b is 2, so the interval notation is
[−3,2]
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