Working with computer tools seemed to promote graphical understanding, as
students in our experiment easily recognized and used many different plots (such as
density curves, histograms, etc.) to solve the problems proposed. Moreover, they
also showed a good understanding of many abstract properties, such as the effect of
parameters on the density curve shape, and made extensive use of graphs as part of
their argumentation. This suggests the essential role of computers to facilitate
students’ exploration of these properties and representations.