HOUSTON — In the final game of the regular season, the Hawks’ offense overwhelmed the Rockets, 130-114, earning the No. 9 seed in the East. 1. Because the Nos. 7-10 seeds in the Eastern Conference have been in such a tight race, the most significant part of the Hawks’ game in Houston (20-62) was how it would affect play-in tournament seeding. With this win, plus the Nets’ win vs. the Pacers and the Cavaliers’ win vs. the Bucks (who rested their starters, to the Hawks’ misfortune), the Hawks will be the No. 9 seed. They will host the 10th-seeded Hornets at 7 p.m. Wednesday at State Farm Arena (…