Use the definition of the function f below to answer the questions: f(x)=x+21 (a) Compute f(2.2),f(2.9),f(2.5),f(2), and f(3). f(2.2)=2.7=2f(2.9)=3.4=3f(2.5)=3=3f(2)=2.5=2f(3)=3.5=3 (b) Describe in words the relationship between x and f(x). Solution v (c) Now define the function g as: g(x)=x21 How do the functions f and g differ?.