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Which interval correctly represents |x| < 3 on the number line?

Answer and explanation

Correct answer: (−3, 3)

The governing concept is the distance interpretation of absolute value. The statement |x| < 3 means that the distance of x from zero is less than 3. Therefore x must be greater than -3 and less than 3, so -3 < x < 3. Since the inequality is strict, neither -3 nor 3 belongs to the solution set. On a number line, both endpoints are shown with open circles and only the segment between them is shaded. In interval notation this is (-3, 3), making option A correct. Option B incorrectly includes both endpoints and would represent |x| ≤ 3. Option C represents values outside the interval, where |x| > 3, and option D fails to impose the lower limit.

Related tags

Linear-InequalitiesAbsolute-ValueNumber-LineInterval-NotationMathematicsRepresentation On Number LineLinear InequalitiesClass 11 Mcq

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