Here it is! The light blue line is an idealized weight loss of 1 pound per week. The darker line is my actual loss, starting from early November till this morning. It's a bit small, and I supposed if I futzed with it I could get it bigger and clearer, but it's good enough. Faithful readers will know the current number, and from there can figure out where I started from.
The actual process. Copy the chart into Visio of all things, and save as a PNG, then insert it just like any other image.