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Which inequality form correctly represents ([-4,3)) on the number line?

Answer and explanation

Correct answer: (-4\le x<3)

The direct answer is option B: \(-4\le x<3\). In interval notation, a square bracket means the endpoint is included, while a round parenthesis means it is excluded. The interval \([-4,3)\) therefore includes \(-4\) but does not include 3. Translating this into inequalities gives \(-4\le x<3\). Option A, \(-4<x<3\), excludes \(-4\), so it does not match the square bracket. Option B includes \(-4\) with \(\le\) and excludes 3 with \(<\), exactly matching the notation. Option C, \(-4<x\le3\), reverses both endpoint conditions. Option D, \(-4\le x\le3\), wrongly includes 3. To check the meaning, test the endpoints: \(x=-4\) belongs, but \(x=3\) does not. Memory cue: read the left bracket first and the right bracket second; square means included, round means excluded.

Related tags

Linear-InequalitiesInterval-To-InequalityNumber-Line

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