“…There is research evidence in literature on studies focused on the concept of a function in Zambia (Malambo, 2019;Marban & Sintema, 2020;Sintema, Phiri, & Marban, 2018) and abroad (Even, 1992;Kontorovich, 2017;Ozgen, 2010;Paoletti, 2020;Ubah & Bansilal, 2018;Wasserman, 2017). Studies that have been conducted in Zambia have investigated pre-service teachers' knowledge of the function concept on a wider basis which included but not limited to definition of a function, quadratic, composite, inverse, one-to-one and different representations of functions.…”