Marzuki, Wahyudin, Sabaruddin, Irfan Rusmar, M. Zaiyar, Habibi Ratu Perwira Negara
This study aims to obtain propositions related to the types and factors that affect students' justification in solving mathematical problems in the application material of algebraic function derivatives. The participants involved were 25 students. The research instrument was a test of the ability the application of algebraic function derivatives and semistructured interview guidelines. This research is a qualitative type with a systematic grounded theory (GT) procedure design. Because this research is GT, the data were analyzed using three stages of open coding, axial coding, and selective coding with the help of the NVivo 12 plus software. The reliability test was carried out by two coders to test categories, and sub-categories with Cohen's kappa value ≥ 0.65, so the coding was made reliable. In-depth interviews were conducted until saturated data were obtained. From the results of the analysis, there are propositions of students 'justification in solving problems related to five types, and three factors that affect students' justification in solving problems with derivative applications of algebraic functions including learning culture, learning resources, and classroom learning. © 2022 American Institute of Physics Inc.. All rights reserved.
Department of Mathematics Education, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi No. 229, Bandung, 40154, Indonesia; Mathematics Education Study Program, IAIN Langsa, Jl Meurandeh, Langsa Lama, Aceh, Kota Langsa, 24354, Indonesia; Program Studi Agribisnis Kelapa Sawit, Politeknik Teknologi Kimia Industri Medan, Medan, Indonesia; Pendidikan Matematika, Universitas Islam Mataram, Mataram, Indonesia
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