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Which interval represents x ≥ 4 on the number line?

Answer and explanation

Correct answer: [4, ∞)

The inequality x ≥ 4 includes 4 because the symbol ≥ permits equality. It also includes every real number greater than 4, so the solution extends indefinitely to the right of 4 on the number line. In interval notation, inclusion of a finite endpoint is shown with a square bracket; therefore the left endpoint is written as [4. The symbol infinity is not a real number and is never included as an endpoint, so a round bracket is used at infinity. Option A has the correct rightward direction but excludes 4. Options C and D describe values extending to the left of 4 and therefore represent the wrong inequality. Hence [4, ∞), option B, is correct.

Related tags

Linear-InequalitiesInterval-NotationRight-RayNumber-LineRepresentation On Number LineLinear InequalitiesMathematicsClass 11 Mcq

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