Easing animations: either ease in/out options, or possibility of custom easing

Easing options all seem to start animations very quickly. There's no equivalent to the ease in / out / in-out options shown on the Greensock easing page (these options are listed at the bottom of the easing list). As a workaround, I'm hoping I can use a custom curve, i.e.:
TweenMax.to( graph,

2.5, {ease: CustomEase.create("custom", "M0,0,C0,0,0.125,0.013,0.266,0.112,0.414,0.216,0.664,0.77,0.784,0.88,0.854,0.944,1,1,1,1"), y: -500});

Is this possible?

Thanks!