A function is a rule that is applied to one set of values to give another set of values. A function can be illustrated on a graph – points are plotted as coordinates and joined by either a straight ...

This paper presents a conceptual analysis for students' images of graphs and their extension to graphs of two-variable functions. We use the conceptual analysis, based on quantitative and ...

This is a preview. Log in through your library . Abstract Formulas are given for the expectation and variance of the number of components for two definitions of random graphs. The results extend those ...