Those two statements are linear equations, not lines.
If the equations are graphed, each one produces a straight line.
The lines intersect at the point (-1, -2).
They are parallel lines.
parallel
neither
The lines are parallel, but not the same.
They are parallel.
They are parallel lines.
They are straight lines.
They are parallel lines.
parallel
neither
If: 12 = 2y+x then y = -1/2x+6 So: y = 2x+4 and y = -1/2x+6 which means that they are perpendicular lines
They are parallel lines
The lines are parallel, but not the same.
parallel
They are parallel.
They are parallel lines with a vertical separation of 1.
It is not one, but they are two perpendicular lines.