Because of high tuition costs at state and private universities, enrollments at community colleges have increased dramatically in recent years. The following data show the enrollment for a certain community college for the nine most recent years. Year Period (e) Enrollment (1,000s) 2001 1 6.7 2002 2 8.3 2003 3 8.2 2004 4 10.4 2005 5 12.3 2006 6 13.11 2007 7 13.5 2038 B 17.0 2009 9 17.9 (a) Construct a time series plot. What type of pattern exists in the data? O The time series plot shows a seasonal pattern. O The time series plot shows a nonlinear trend. The time series plot shows a horizontal pattern. O The time series plot shows a linear trend. (b) Use simple linear regression analysis to find the parameters for the line that minimizes HSE for this time series. (Round your answers to two decimal places.) (d) What is the forecast for year 10 (in 1,000s)? (Round your answer to one decimal place) thousand students