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Which form is correct when ( -6x+8<20 ) is shown on the number line?

Answer and explanation

Correct answer: open circle at \(-2\) with shading to the right

Given \(-6x+8<20\), subtract 8 from both sides to get \(-6x<12\). Dividing by \(-6\) reverses the inequality sign, so \(x>-2\). Since the inequality is strict, \(-2\) is shown with an open circle, and values greater than \(-2\) are shaded to the right. Option C has the correct direction but wrongly includes \(-2\) with a closed circle. Exam tip: always reverse an inequality when multiplying or dividing by a negative number.

Related tags

Linear InequalitiesNumber LineInequality ReversalNegative CoefficientOpen CircleRepresentation On Number LineMathematicsClass 11 Mcq

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