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If points A = −2.25 and B = −0.75 lie on the number line, what is the length of segment AB?

Answer and explanation

Correct answer: 1.5

The distance between two points on a number line is the absolute value of the difference of their coordinates. Thus, AB = |−0.75 − (−2.25)| = |1.5| = 1.5 units. The value 0.75 is only the distance of B from zero, not the distance between A and B. Exam tip: subtract the smaller coordinate from the larger coordinate to obtain the positive distance.

Related tags

Number LineDistance Between PointsNegative DecimalsAbsolute ValueReal NumbersRepresenting Real Numbers On The Number LinePolynomialsMathematics

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