Graph paper comes in variety of forms including polar, logarithmic, semi-log, and the regular old square grid. This may create the impression that the paper, or the imagined paper, or the grid in a computer graphic somehow influences or determines the curves, functions, and relations depicted in the graph. The truth is: the two-dimensional Euclidian (flat) plane is one, and only one, ideal. The grid lines may or may not be helpful in sketching or interpreting the graph, but they are just what you call guidelines. What makes a graph, a graph is the co-ordinate system.