Hmmm...I don't think you need the "live' method. The 'change' method should work on its own. Also, declaring the var 'title' isn't necessary. That part isn't an issue for anything except saving you some writing in the future. So, it should work as....
$('select[id$="Report_Type"]').change(function() {
if($(this).val()=='Rebuttal') {
$("[id$='Evaluations']").show();
}
else {
$("[id$='Evaluations']").hide();
}
});