Question

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

Explanation:

Step1: Identify coordinates

The coordinate of point $K$ is $64$ and the coordinate of point $L$ is $68$.

Step2: Use distance formula

The distance between two points on a number - line is given by $d=\vert x_2 - x_1\vert$. Here, $x_1 = 64$ and $x_2=68$. So, $d=\vert68 - 64\vert$.

Step3: Calculate the distance

$\vert68 - 64\vert=\vert4\vert = 4$.

Answer:

$4$