Question

A line segment on a number line has its endpointd at -9 and 6. Find the coordinate of the midpoint of the segment. A. 1.5 B. -1.5 C. 2. D. -3

Answer 1

$\bf \boxed{-9}\rule[0.35em]{9em}{0.25pt}-2\rule[0.35em]{1em}{0.25pt}\stackrel{\stackrel{midpoint}{\downarrow }}{-1.5}\rule[0.35em]{1em}{0.25pt}-1\rule[0.35em]{2em}{0.25pt}0\rule[0.35em]{10em}{0.25pt}\boxed{6}$

from -9---------------------------0------------------6, there are 9+6 units, namely 15, half that is 7.5, 7.5 units from -9 is -1.5.