O Geogebra como recurso didático para a aprendizagem do esboço de gráficos de funções que diferem de outras por uma composição de isometrias ou homotetias.

Abstract

This work has as main goal the development, implementation and analysis of an instructional sequence designed to promote learning sketch graphs of functions that differ by isometries of certain functions and homotheties aimed at students of the second year of high school. Work is the behavior of the graphs of sine functions, and modular power when subjected to translations (vertical and horizontal), Reflections in the x-axis, homotheties (expansions and contractions that leave a fixed point) and composition of these transformations. Teaching resources for learning used in this proposal are the dynamic geometry software GeoGebra and pencil and paper. Were used as theoretical and methodological Theory of Didactic Situations of Guy Brousseau, Theory of Semiotics Representation Registers Raymond Duval and Engineering Curriculum Artigue. The Didactic Engineering is a methodology that seeks to study the work done in the classroom through a process of internal validation, that is, comparing what the student knew before having contact with the teaching tool with what he was able to understand after carrying out the work. This research reinforces the final result, the hypothesis that, even without the formal conceptual domain of isometries and homotheties, students can reveal a great performance in sketch graphs of functions that differ from other graphics functions previously known by the composition of isometries and homotheties when using GeoGebra as a teaching resource to assist the visualization of geometric effects in the records of processing operations corresponding to isometries and homotheties held under the algebraic records.