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What is the distance between \(A=-\frac{3}{2}\) and \(B=\frac{5}{2}\) on the number line?

Answer and explanation

Correct answer: (4) units

The direct answer is option C, 4 units. Distance on a number line means the positive gap between two positions, so use the absolute difference: \(AB=\left|\frac52-\left(-\frac32\right)\right|\). Subtracting a negative becomes addition: \(\frac52+\frac32=\frac82=4\). Option A, 1 unit, is too small and does not equal the gap. Option B, 2 units, ignores the full movement across zero. Option C, 4 units, is correct; from \(-1.5\) to 0 is 1.5 units and from 0 to 2.5 is 2.5 units, totaling 4. Option D, 5 units, is an incorrect sum. The answer must be positive even though the first point is negative. Memory cue: distance equals right endpoint minus left endpoint, or always use absolute difference.

Related tags

PolynomialsNumber-LineDistance-FractionsMedium

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