The image for this does not appear to be in the course files.
At least for sure it's in the course files of the fundamentals of mesh modeling. Linking up:
https://cgcookie.com/lessons/what-to-take-next-and-share-your-voice-428be950a74d0c41
I'll tell Amber it's missing here and she'll do her coding magic and it'll appear here as well.
Yes indeed, must be an oversight. Thanks for the heads up!
For now, the image can be found in the reference folder of the above mentioned Course: https://cgcookie.com/courses/core-fundamentals-mesh-modeling