Radio Stations The function fgives the number y in thousands of radio stations on the air...

Radio Stations The function fgives the number y in thousands of radio stations on the air during year x.

(Source: M. Street Corporation.)

(a) Use a mapping diagram (see FIGURE 19) to represent f.

(b) Evaluate f(2000) and explain what it means.

(c) Identify the domain and range of f.

Figure 19