Final answer:
The University of Washington was the first western school to participate in the Poughkeepsie Regatta in 1912.
Step-by-step explanation:
The first western school that participated in the Poughkeepsie Regatta in 1912 was the University of Washington. The Poughkeepsie Regatta is a famous rowing competition held on the Hudson River in Poughkeepsie, New York. It started in 1895 and has been an important event in college rowing history. The University of Washington, located on the West Coast, became the first western school to participate in the regatta in 1912.