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If the number line is shaded from 18 to 25 and both endpoints are closed, what is the inequality?

Answer and explanation

Correct answer: 18 ≤ x ≤ 25

The shaded portion lies between 18 and 25, so x cannot be less than 18 or greater than 25. A closed endpoint means that the corresponding boundary value is included in the solution. Since both 18 and 25 are shown with closed endpoints, both values must be included. The resulting compound inequality is 18 ≤ x ≤ 25, and its interval notation is [18, 25]. Option A uses strict inequalities and excludes both endpoints. Option B includes 18 but excludes 25, while option C excludes 18 but includes 25. Neither matches two closed endpoints. Therefore option D is the only inequality that accurately represents the shaded segment.

Related tags

Linear-InequalitiesClosed-IntervalCompound-InequalityNumber-LineRepresentation On Number LineLinear InequalitiesMathematicsClass 11 Mcq

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