This graph paper’s grid is used when graphing two-dimensional equations, and this versatile graph paper is useful for sketches, craft projects, layouts and other non-math activities.Įngineering graph paper lines are similar to Cartesian graph paper’s two perpendicular sets of lines forming a square grid. This type of graph paper is identified by its two perpendicular sets of lines forming a square grid. Cartesian graph paper is the most popular form of graph paper in use.