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If the number line has closed circles at -1 and 4 with shading between them, what is the inequality?

Answer and explanation

Correct answer: -1 ≤ x ≤ 4

The governing concept is reading endpoint inclusion and interval direction from a number-line representation. A closed or filled circle means the endpoint is included in the solution set, so both -1 and 4 must use inclusive symbols. Shading between the two points means that x lies from -1 through 4, giving -1 ≤ x ≤ 4. This is the closed interval [-1, 4], and option B is correct. Option A would correspond to open circles at both ends because it excludes both endpoints. Option C would require a closed circle at -1 and an open circle at 4, while option D would require the reverse. Thus the symbols and the shaded direction together identify only B.

Related tags

Linear InequalitiesNumber LineClosed IntervalClass 11Representation On Number LineMathematicsClass 11 Mcq

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