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

Explanation:

Step1: Identify the coordinates

The coordinate of $W$ is $6$ and the coordinate of $X$ is $7$.

Step2: Use the distance formula for a number - line

The distance between two points on a number - line is $d=\vert x_2 - x_1\vert$. Here, $x_1 = 6$ and $x_2 = 7$. So, $d=\vert7 - 6\vert$.

Step3: Calculate the result

$\vert7 - 6\vert=1$.

Answer:

$1$