Quadrilateral WXYZ is on a coordinate plane. Segment XY is on the line x-3y=-12 , and segment WZ is on the x-3y=-6. Which statement proves how segments
XY and WZ are related?
a. They have opposite reciprocals slopes of 1/3 and -3 and are, therefore, perpendicular.
b. They have the same slope of - 1/3 and are, therefore, parallel.
c. They have opposite reciprocals slopes of - 1/3 and 3 and are, therefore, perpendicular.
d. They have the same slope of 1/3 and are, therefore, parallel.