7. Seniors must reserve seats at graduation for their family members who plan on attending the ceremony. 100 Number 80 of seats 60 number reserved 40 20 10 20 30 40 50 Number of seniors What is the rate of change? A) 3 seniors per reserved seat B) 3 reserved seats per senior C) 2 seniors per reserved seat D) 2 reserved seats per senior. er ft enovo