Graph of x < −1 or x ≥ 3 on a number line

An example figure from the Number Line Generator.

A number line from −5 to 5 with an open circle at −1 and a thick line running left, and a closed circle at 3 with a thick line running right — A number line from −5 to 5 with the “or” inequality x < −1 or x ≥ 3 graphed on it. An open circle at −1 has a thick line running off the left end, and a closed circle at 3 has one running off the right end, each with its own arrow. The numbers between −1 and 3 are left out.

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Answer key

x < −1 or x ≥ 3: (−∞, −1) ∪ [3, ∞)

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