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If point A has coordinate −3.25 and point B has coordinate 2.75 on the number line, what is the midpoint of line segment AB?

Answer and explanation

Correct answer: −0.25

The coordinate of the midpoint is the average of the coordinates of the two endpoints: \(\frac{-3.25+2.75}{2}=\frac{-0.50}{2}=-0.25\). Therefore, option B is correct. Option A is only the sum of the two coordinates, not their average. In the exam, remember to divide the sum by 2 when finding a midpoint.

Related tags

Number LineMidpointDecimalsCoordinate GeometryReal NumbersRepresenting Real Numbers On The Number LinePolynomialsMathematics

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