Work has started up again on the MATH130 notes.
I've made some small changes to the section on Graphs and Functions, as well as the Parabolas section, standardizing how I intend to use GNUPLOT. There have been one or two other minor functions, nothing of which warrants pushing a new PDF to Github just yet but there should be some new content coming through on Friday night or Saturday. I also included a short recommendation on a piece of software called Geogebra. It really is quite fantastic stuff.