Description:

In this video, Assistant Professor Joel De Castro from the Faculty of Education at UP Open University guides students through the essential concept of mathematical functions, explaining what they are, how they work, and why they matter in both mathematics and everyday life. Designed for learners, the lesson introduces the definition of a function and related terms, explores different types of functions, and shows how to identify the domain and range. It also walks through evaluating functions and performing various operations on them, including addition, subtraction, and composition, giving students a clear and solid foundation for understanding functions.