My group did all the work, now what?

Do you even care about your grade? I don't know if you're high school or college, but in my university group projects, each team member filled out an evaluation form for themselves, as well as for each group member so the professor could evaluate the weight of work each person contributed.

If you made absolutely no effort on this project and don't care about your grade, there's no point in going to the presentation. Frankly, no matter how hard the project was, you should have contributed something. I would give you an F if you didn't do anything.

"your work here is done"? You mean the work you didn't do because you are both lazy and dumb or the work are trying to take credit for when you dont deserve it?

Since it seems like everyone in your group is on the same page and they agree that your are worthless I thinking you should stay home...what would be the point. I guarantee you that if your group knows you are lazy your teacher does as well...so either way you still getting a crappy grade.

You proably shouldn't go you might mess up the presentation

Just go home.