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Which description correctly represents x ∈ [-2, 6] \ {3} on the number line?

Answer and explanation

Correct answer: Shading from −2 to 6 with an open circle at 3

The interval [-2, 6] includes every real number from −2 through 6, including both endpoints. The set-difference symbol \\ means that the element 3 must be removed from this interval. On a number line, this is shown by shading the whole segment from −2 to 6, placing closed endpoints at −2 and 6, and marking 3 with an open circle or a small gap. Thus option A gives the correct description. Option B incorrectly keeps 3, option C shows only one point rather than the entire interval, and option D includes numbers outside the stated bounds.

Related tags

Linear-InequalitiesSet-DifferenceNumber-LineInterval-RepresentationRepresentation On Number LineLinear InequalitiesMathematicsClass 11 Mcq

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