Graph Editor

Hey I want to know if there is a permanent way to turn off that setting in blender when your doing animations it has a slow start and it slows down towards the ending. I know you can go into the graph editor and fix the animation but I almost never run into a situation where I actually like the effect. Can anyone help? Thanks.
http://s21.postimg.org/qvb3s7uc6/Screenshot_2.jpg
ENLARGE IMAGE HERE http://s21.postimg.org/ax2e23045/Screenshot_2.png

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Thanks Richard! Your awesome