The Piecewise Linear Grapher is developed by the Concord Consortium and informed by previous work on Calculus Unlimited by Michal Yerushalmy and Judah Schwartz. The Piecewise Linear Grapher explicitly links changes a user makes in a graph of a linear function with corresponding changes in its symbolic expression. Changes in the graph produce corresponding changes in its symbolic notation. Conversely, changes in the symbolic form result in changes in the graph.
Beyond simple linear functions such as lines or bent lines, users may explore step functions – those that are discontinuous in range and/or domain - as well as linear relationships that are not functions. For example, with cases in which a graph defines a non-function because a single input yields more than one output, the PLG alerts the user and then allows continued exploration.
Innovative technology developed by the Concord Consortium permits networked users of our software to save with one click an image of any screen made with CC interactive software. They can then share their work with other networked users in real time or asynchronously.