A Variational Approach for the Significance of Derivative Criteria in Motion-Modeling Situations. Advances of Research in Mathematics Education, [S. l.], n. 27, p. 157–177, 2025. DOI: 10.35763/aiem27.6157. Disponível em: https://aiem.es/aiem/article/view/v27-zaldivar-cabrera-jimenez. Acesso em: 20 may. 2026.