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The number line is shaded from ( -\frac{5}{2} ) to ( \frac{7}{2} ), and both endpoints are closed. What is the correct inequality?

Answer and explanation

Correct answer: ( -\frac{5}{2}\le x\le \frac{7}{2} )

The direct answer is option B: -5/2≤x≤7/2. A closed endpoint means that endpoint is included, and inclusion is written with ≤. Since both endpoints are closed, both inequalities must be non-strict. The shaded interval therefore contains every number from -5/2 through 7/2, including the two endpoints. Option A uses < at both ends, so it excludes both endpoints and would describe open dots. Option B includes both ends and is correct. Option C excludes -5/2 but includes 7/2, so it would have a left open and right closed endpoint. Option D includes -5/2 but excludes 7/2, the reverse pattern. The order is also correct because -5/2 is negative and lies to the left of 7/2. Memory cue: closed dot means ≤; open dot means <.

Related tags

Linear-InequalitiesFraction-IntervalNumber-Line

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