Question: The round brackets indicate the endpoints are not included in the set of values. This graph shows that the x-values or -1 and 1, as

The round brackets indicate the endpoints are not included in the set of values. This graph shows that the x-values or -1 and 1, as well as the y-values of -1 and 1, are included on the graph. How to show these points in interval notation?

The round brackets indicate the endpoints are not included in the set

( 1, 1)

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