ANSWER
Neither parallel nor perpendicular
EXPLANATION
To find if the lines are parallel or perpendicular, we have to find the slopes.
The slope of a line passing through points (x₁, y₁) and (x₂, y₂) is,
[tex]m=\frac{y_1-y_2}{x_1-x_2}[/tex]The slope of line WX, passing through points W(2, 1) and X(6, 2) is,
[tex]m_{WX}=\frac{1-2}{2-6}=\frac{-1}{-4}=\frac{1}{4}[/tex]The slope of line YZ, passing through points Y(2, -2) and Z(6, -2) is,
[tex]m_{YZ}=\frac{-2-(-2)}{2-6}=\frac{-2+2}{-4}=0[/tex]Two lines are parallel if they have the same slope, and perpendicular if they have opposite reciprocal slopes.
In this case, the slopes are 1/4 and 0, which are neither the same nor opposite reciprocals.
Hence, lines WX and YZ are neither parallel nor perpendicular.