Question

what is the length of $overline{lm}$?

Explanation:

Step1: Identify coordinates

The coordinate of point $L$ is - 30 and the coordinate of point $M$ is - 26.

Step2: Use distance formula on number - line

The distance between two points $a$ and $b$ on a number - line is $|a - b|$. Here, the length of $\overline{LM}=|-26-(-30)|$.

Step3: Simplify the expression

$|-26 + 30|=|4| = 4$.

Answer:

4