Sam, a senior at Universal High School, is opening a savings account and initially puts in $1800 that he receives from his grandparents at graduation. He never adds anymore of his own money, and the bank pays an interest of 15% per year. Which of the following is the correct function rule for this scenario? 0 y=1800(0.15)' O y=0.15x+1800 O y=l.15x+1800 O y=180(}(1.15)'r