Graphs can be some of our more challenging material. Sometimes a minimal amount of graphic editing is required to bring them up to standard. Other times we are able to combine more extensive graphic editing with some vector graphics. Frequently we have no choice but to painstakingly redraw the entire graph, line by line. This example belonged to the third category. The advantage of redrawing a graph is that we can then demonstrate the differences through varying broken line patterns, something that was not required in this instance, but which would have been a simple operation on our part.
