Explore the fundamental concepts of relations and functions in this comprehensive Grade 11 mathematics course. Delve into topics such as relations, functions, graphs of inverse functions, power functions, absolute value (modulus) functions, signum functions, and floor (greatest integer) functions. Learn about one-to-one, onto, and one-to-one correspondence functions, as well as function composition and combination. Master inverse functions and their graphical representations. Designed for Ethiopian Grade 11 students, this course provides a solid foundation in mathematical relationships and functional analysis.