Describir: Graphs and their uses

 _    _      ___      _____      ___      _____    __   __    ____    
| |  | ||   / _ \\   / ____||   / _ \\   / ____||  \ \\/ //  |  _ \\  
| |/\| ||  | / \ || / //---`'  / //\ \\ / //---`'   \ ` //   | |_| || 
|  /\  ||  | \_/ || \ \\___   |  ___  ||\ \\___      | ||    | .  //  
|_// \_||   \___//   \_____|| |_||  |_|| \_____||    |_||    |_|\_\\  
`-`   `-`   `---`     `----`  `-`   `-`   `----`     `-`'    `-` --`  
                                                                      
   ___    
  / _ \\  
 | / \ || 
 | \_/ || 
  \___//  
  `---`