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How is the interval [-4, 3) written as an inequality?

Answer and explanation

Correct answer: −4 ≤ x < 3

Interval notation communicates endpoint inclusion through its brackets. A square bracket means that the endpoint belongs to the set, while a round parenthesis means that it is excluded. In [-4, 3), the square bracket at −4 includes −4, and the parenthesis at 3 excludes 3. Therefore the equivalent double inequality is −4 ≤ x < 3, which is option A. Option B reverses the inclusion status of both endpoints. Option C excludes both endpoints, and option D includes both endpoints. Checking each endpoint separately prevents the common mistake of treating all interval endpoints in the same way. Hence A is the exact translation.

Related tags

Interval NotationNumber LineLinear InequalitiesClass 11 MathematicsRepresentation On Number LineMathematicsClass 11 Mcq

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