Can someone help me out with these questions and for G can someone tell me what the hidden variable is

F. What graphical evidence is there of a hidden variable? [Thinking 2 marks] G. In 2007, a large factory shut down due to the poor economy. How do you think this affected this correlational study? (Identify the hidden variable) [Thinking 5 marks] H. What do you think happened over the next few years following the plant closure? [Thinking 3 marks]Annual Attendance 4 ( Thousands) 3 2 2001 2002 2403 2004 204 2006 2007 2008 2009 2010 2011 20/2 year Scatter plot: Annual Attendance in League Baseball Team