What is the third number in the row that results from 1/3 R1 + R2? R1 = [ -6 3 0 -12 ]
R2 = [2 -4 15

Michael gose to a theme park and rides two different roller coasters that both begin on a raised platform his height while on the first roller coaster measured in feet from the platform height can be modeled by the following graph where t is the number of seconds since the ride began