• Different possibilities could be considered from this mathematical situation:
  • To find the model of the situation with a graphic representation.
  • To introduce a function of the model, expressed in a symbolic way.
  • To compare models, according to the choice of variables.
  • To conjecture about model, supported by justifications.
• It could be interesting to lean trainees to the construction of the model with different software.
  • How to use commands in order to obtain a model?
  • Which models and representations can they obtain with a the software?
  • How different software can support different dynamic representations?