Maya animation adjust camera zoom speed

Batu_Khan

I have a scene in Maya where the camera is zooming at a constant speed. I want to adjust it so the camera zooms more slowly at the beginning of the animation and resumes normal speed  as it continues. The camera isn't attached to a path. I entered the keyframes manually. I tried using the graph editor, but could only manage to change the position of the camera, but not the speed.

oglu

The position is the speed.

Batu_Khan

I see. My problem was I was trying to move the points in the graph with the move tool and not the scale tool. Thank you for responding.