2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/164486This paper has been withdrawn by the authors. It has been replaced by the papers: "Drawings of Planar Graphs with Few Slopes and Segments" (math/0606450) and "Graph Drawings with Few Slopes" (math/0606446).This paper has been withdrawn by the authors. It has been superseeded by the papers: "Drawings of Planar Graphs with Few Slopes and Segments" (math/0606450) and "Graph Drawings with Few Slopes" (math/0606446). A preliminary version appeared in the Graph Drawing 2004 conferenceDiscrete MathematicsComputational Geometrytext