Not to be confused with the Tina who was killed in 1985’s Friday the 13th: A New Beginning, this Tina, played by actress Camilla More, met her maker in 1984’s Friday the 13th: The Final Chapter (which wasn’t the final chapter by a long shot). Her twin sister, Carey, played Terri in this same film. In this scene, Tina looks out the window and sees Terri’s bike outside, not knowing Terri got killed by Jason just a little while earlier. In fact, Tina doesn’t live long enough to learn about her sister’s demise, as she herself joins the ranks of death very shortly afterwards.
As for Camilla, her acting career didn’t die after this film, as her IMDb page will show. It states in the “trivia” at IMDb that her and her sister Carey are fraternal twins, but they sure look identical in this film, elsewhere, and they did a Doublemint chewing gum commercial together, so it seems like that’s incorrect or they look close enough alike that with the right makeup, they can look identical. A long gap between Camilla’s last two credits suggests she quit acting to raise a family, but that’s just my guess.