Hello again, symmetry!
Okay, here's an example.
. .
When is between and (including the endpoints),
. . the graph is , a horizontal line. Code:

3* * * * *


 +    +  
 1
When is greater than 1, the graph is ,
. . a slanted line. Code:

 *
 *
 *
 *
3 *


 +    +       
 1
Sketch them on the same graph
. . and have the graph of the piecewise function. Code:

 *
 *
 *
 *
3o * * * *


 +    +       
 1
This function could be your longdistance charge.
They might charge $3 for the first minute
. . and $2 per minute for every subsequent minute.
(Hmmm, not a good example . . .
I'm sure someone will point out why.)