Annual estimates of the population in a Hawaiian county from 1999 (t = 1) onward are shown in the time series graph below. What is the dominant component in this time series? Click the icon to view the time series plot. Solution The dominant part in this time series is just the upward trend. It is not cyclic (repetative), it is not seasonal (some time up and some time down) and it is not random either (not that random actually)..