I tried to collapse the better part of two classes into this 16 minute, 20 second video. After watching this you should be able to do almost all the questions in exercises #8 and #9.
Two things: For some reason the video is about 12 seconds ahead of the audio. Also, at one point I misspoke and described y=f(-x) as a reflection over the x-axis. That's not right, it's a reflection over the y-axis. Everything else I said about that transformation is correct.
Here's the Google video ...
A lot of the video quality was lost. There's a better (not best) version here. Click that link to see a much better quality video.
A nice thing about video ... you can [pause] [rewind] [repeat] as often as you like until you "get it." Nonetheless, feel free to ask questions ... in the comments to this post or when I see you on Monday.
You may also find these links helpful ...
All about vertical reflections
And you can find a tutorial and interactive java applet here to review and learn all about vertical and horizontal stretches, compressions and reflections.
Let me know which link you liked the best. ;-)