Question

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

Explanation:

Step1: Identify coordinates

The coordinate of point $J$ is $- 15$ and of point $K$ is $5$.

Step2: Use distance formula

The distance between two points $a$ and $b$ on a number - line is $|b - a|$. Here, $a=-15$ and $b = 5$, so the length of $\overline{JK}=|5-(-15)|$.

Step3: Simplify the expression

$|5-(-15)|=|5 + 15|=|20| = 20$.

Answer:

$20$