LEITURA E INTERPRETAÇÃO DE GRÁFICOS ESTATÍSTICOS: UMA ANÁLISE SOBRE O ENTENDIMENTO DE ALUNOS DE UM 9.º ANO / READING AND INTERPRETATION OF STATISTICAL GRAPHS: AN ANALYSIS OF THE UNDERSTANDING OF 9TH GRADE STUDENTS

This article aims to investigate the performance of a group of students, through three activities involving the reading and interpretation of bar graphs, sectors, and lines. This study involved 32 9th grade (14 years) students from a private school on the south coast of the state of São Paulo. For this purpose, a qualitative analysis was carried out from a diagnostic and descriptive perspective. The process of analyzing the graph language understanding was based on the ideas proposed by Curcio, who considers three levels of graph language comprehension. We concluded that this group of students has a low performance in the understanding of the graph language of the second level, but in the first and third levels the students had more agility in the three types of assessed graphs.