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On a number line, the solution set of an inequality is shown by a filled dot at 3 and shading to the left of 3. Which inequality does it represent?

Answer and explanation

Correct answer: \(x \leq 3\)

A filled dot means that the boundary value 3 is included in the solution set, and shading to the left represents all values less than 3. Therefore, the inequality is \(x \leq 3\). For \(x < 3\), the value 3 would not be included, so the dot would be open. Exam tip: a filled dot corresponds to \(\leq\) or \(\geq\), while an open dot corresponds to \(<\) or \(>\).

Related tags

Linear InequalitiesNumber LineSolution SetInequality SymbolsClass 11 MathematicsRepresentation On Number LineMathematicsClass 11 Mcq

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