I declined an offer from Arizona yesterday(my local time), which came around a week ago, but that gc post is not mine, and I think there is hope that they would at least make one or two more in the short future
Wish you best of lucks
An update from my personal experience: after a few days when the official offer came out so that you can officially accept it on the portal, there would be a 'decline' option along the side.
Not accepted by Minnesota though, I got an offer from a university that I would probably decline. I am wondering how should I decline an offer, as I see no 'withdrawn' button on the portal, shall directly reply to the email with admission letter? or maybe forward to the director of graduate study?
Oh, I was quoting about Rochester, are you referring to another school? Or did you receive an interview invitation from Rochester? It seems unusual and I am not sure about its meaning, anyway, good luck to you!
I sent an inquiry on my status and got an immediate response from the program coordinator, saying that they made decisions weekly and I still need to wait.