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If the number line is shaded between -1 and 6, with -1 open and 6 closed, which inequality is correct?

Answer and explanation

Correct answer: −1 < x ≤ 6

A number-line endpoint carries inclusion information. An open circle at −1 means that −1 is excluded, so the inequality must be strict there: x > −1. A closed circle at 6 means that 6 is included, so the inequality must use x ≤ 6. Combining the two conditions gives −1 < x ≤ 6, represented by the interval (−1, 6]. Therefore option C is correct. Option B incorrectly excludes 6, option A incorrectly includes −1 and excludes 6, and option D incorrectly includes both endpoints. The direction of shading between the endpoints confirms that all values in this bounded interval are intended.

Related tags

Linear-InequalitiesNumber-LineOpen-Closed-EndpointsInterval-NotationRepresentation On Number LineLinear InequalitiesMathematicsClass 11 Mcq

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