Question

use the number line to find each measure.

1. xy
2. wz

Explanation:

Step1: Identify coordinates

The coordinate of \(X=-1\) and \(Y = 7\).

Step2: Calculate distance

The distance between two points \(a\) and \(b\) on a number - line is \(|a - b|\). So, \(XY=| - 1-7|=| - 8| = 8\).

Step3: Identify coordinates for \(W\) and \(Z\)

The coordinate of \(W=-5\) and \(Z = 4\).

Step4: Calculate distance

\(WZ=| - 5 - 4|=| - 9|=9\).

Answer:

1. \(8\)
2. \(9\)