They are straight lines. They are positively inclined. They have the same gradient.
Without an equality sign it is not an equation
They are parallel lines with a vertical separation of 1.
They are parallel lines.
Perpendiculat straight lines.
neither
They are parallel lines
Without an equality sign it is not an equation
They are parallel straight lines,
They are parallel lines.
They are straight lines.
They are parallel lines with a vertical separation of 1.
They are parallel lines.
Perpendiculat straight lines.
parallel
parallel
neither
perpendicular