2)
Given,
The coodinates of point P is (-6,4).
The coordinates of point R is (-8,6).
The length of PR is,
[tex]PR=\sqrt[]{(x_2-x_1)^2+(y_2-y_1)^2}[/tex]
Substituting the values then,
[tex]\begin{gathered} PR=\sqrt[]{(-8-(-4))^2+(6-4)^2} \\ PR=\sqrt[]{(-8+4)^2+(6-4)^2} \end{gathered}[/tex]
Hence, option B is correct.
