Question

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

Explanation:

Step1: Identify the coordinates of Q and R

The coordinate of Q is 4 and the coordinate of R is 5.

Step2: Use the distance formula on a number - line

The distance between two points \(a\) and \(b\) on a number - line is \(|b - a|\). Here, \(a = 4\) and \(b = 5\), so the length of \(\overline{QR}=|5 - 4|\).

Step3: Calculate the result

\(|5 - 4|=1\)

Answer:

1