Functions of a Discrete Random Variable

[Usagi]

EDIT: Oh and I forgot that $p_Y(y) = 0$ otherwise.

 

[Jameson]

There was a problem for some users not being able to see the image which was hosted on imageshack.com so I reuploaded it onto tinypic.com and changed the link accordingly. If anyone has an issue seeing the image please let me know ASAP.

Jameson