Contribuições das variáveis estatísticas na contextualização da função afim

Abstract

This paper aims to analyze the possible contributions of statistics for the contextualization of affine function. We built the sequence “Statistics Covariation in the Affine Function”, based on the principles of the Investigative Cycle and Statistical Literacy, and we carried out a teaching intervention with 24 students from the 1st year of High School and Technical Nursing integrated course, in six meetings, with 12 class hours. The students collected their data from anthropometric variables and analyzed them both in a univariate manner, as well as the possible relationships between them using the scatterplot. They chose two points and found the corresponding linear function discussing the reasonableness of their choices. The students were able to visualize the data distribution, in the univariate and bivariate context; however, they presented difficulties in formalizing the linear function, and the analysis of the relationships between the variables was still influenced by their beliefs and not by the evidence of the data.