College Algebra Fifth Edition James Stewart Lothar Redlin Saleem Watson. Functions. 3. What Is a Function?. 3.1. What is a Function?. Perhaps the most useful mathematical idea for modeling the real world is the concept of function, which we study in this chapter.
James StewartLothar RedlinSaleem Watson
(c) Find the domain and range of f.
(d) Draw a machine diagram for f.
f(x) = x2, 0 ≤x ≤ 5
then the domain is the set of all real numbers x for which 0 ≤x ≤ 5.