PT Journal AU KRIEG, J TI VISUALIZATION OF DIFFERENTIAL FUNCTION SO Trends in education PY 2016 BP 175 EP 180 VL 9 IS 1 DI 10.5507/tvv.2016.023 DE differential of function; difference; geometric interpretation of differential; freeware GeoGebra; approximation of function AB The article describes how to use GeoGebra geometrically illustrate the concept of differential function and thereby make this concept to students in the basic course of mathematics at the university. The article concludes with a few examples of the application of differential. ER