Yo sup??
D E F G H I J K L M N O P Q R S T U V W X Y Z
3 3 3 4 4 4 5 5 5 6 6 6 7 7 7 7 8 8 8 9 9 9 9
DOMAIN: [A,Z]
RANGE:[2,9]
Yes this relation is a function because each value of alphabet has only 1 number associated to it.
The sequence is : 43556
(This thing remind me of the immortal nokia phone)
Hope this helps