Proposal for Treating Global Interpretation of the Quadratic Function Using the Software GeoGebra

Ana Luisa Gómez-Blancarte
Rebeca Guirette
Felipe Morales-Colorado

Abstract. Based on Duval’s (1988) interpretation about the treatment of graphical
representations, this paper presents a proposal to the global interpretation of
the quadratic function f (x) = ax 2 + bx + c by using the Software GeoGebra. In
order to illustrate the relevance of the proposal in the teaching, a case study
of a group of high school students is presented. The results show the potential
of the software for a congruence analysis among graphic and algebraic registers
of representation and its effects on qualitative recognition of the association
of visual variables and significant symbolic units.

Keywords: Quadratic function, global interpretation, coordination among registers,
visual variables and significant symbolic units

DOI: 10.24844/EM2903.07

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