grapher with many features
allowing graphing, shows limits, asymptotes, limits at infinity, by Tom Owsiak, Atlanta, GA, 5/19/2013
www.livingcalculus.com
www.livingalgebra.com
www.livingstats.com
watch this video for an example of how to use
http://www.youtube.com/watch?v=TA1xyUOp5M4&feature=youtu.be