Mathematics conceptual errors in the learning of a linear function- a case of a Technical and Vocational Education and Training college in South Africa. J. indep. teach. learn. (Online) [Internet]. 2023 May 31 [cited 2024 Nov. 22];18(1):81-97. Available from: https://journals.assaf.org.za/index.php/ijtl/article/view/17173