This is an extended activity following [url=https://www.geogebra.org/m/ptek2nwg]an introduction[/url] and [url=https://www.geogebra.org/m/k2qt4g5e]a simpler activity[/url]. [br][br]This shows the more general situation where the initial lines forming the stitching could be varied. More examples of quadratic graphs in the form of [math]y=ax^2+c[/math] could be generated and discussed.