Learning Mathematical Modelling: Junior School Student’s Argumentative Ability Through a Visual-Formed Problem

This paper was to describe junior high school students' argumentative ability mathematically using a visual-formed problem. The type of this research was descriptive with a qualitative approach. The subjects of this research were 19 students of the 7 grade-student of SMPN 6 Inderalaya Utara. A post-test was used to collect data to describe the students' ability to give arguments mathematically. This research found that the percentage average of the students’ argumentative ability was 41,66%. Besides, the students were interested in studying a visual-formed mathematical problem under a mathematical modelling framework.