Answer: The length of the given line segment is 16 units.
Step-by-step explanation: We are given to find the length of he line segment with endpoints -9 and 7.
We know that
the length of a line segment on the number line with endpoints b and a is given by
\(L=(b-a)~\textup{units}.\)
Therefore, the length of the given line segment will be
\(L=7-(-9)=7+9=16~\textup{units}.\)
Thus, the length of the given line segment is 16 units.
