You can change the view by adjusting it at the top of the report page and running the report under the new parameters. Unfortunately there isn't a way to change the default display of the graph. If you'd rather not view the goal line at all, you can click on the report legend at the bottom where it says "Your Goal" and that will toggle the line off (and back on, if you choose).
As an aside, I love your username! Very motivating!