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If no point or region is shaded on a number line, what can the solution be?

Answer and explanation

Correct answer: The empty set

The governing concept is the relationship between shading and a solution set on a number line. Shading identifies the real numbers that satisfy the given equation or inequality. If no point and no interval is shaded at all, then no real number satisfies the condition. The solution set is therefore the empty set, written as ∅ or {}. Option A, all real numbers, would require the entire number line to be shaded. Option C, only 1, would require a marked point at 1, and option D, only negative numbers, would require shading on the negative half-line. Since none of those graphical features is present, the correct interpretation of no shading is no solution, or the empty set. Hence option B is correct.

Related tags

Linear-InequalitiesEmpty-SetNumber-LineNo-SolutionRepresentation On Number LineLinear InequalitiesMathematicsClass 11 Mcq

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