9. The following CPI table ranges from the years 1986 to 2006. 120 Index value 110 00 1906 1907 1900 1900 1990 1991 1992 1993 1994 1995 1996 1997 1990 1999 2000 2001 2002 2000 2004 2005 2006 year a) What year is the index based on? b) Describe the trends in consumer prices for goods and services between these years. c) Calculate the percentage change between the years 1991 and 2004. What does this value mean for the consumer? 10. The box and whisker plot below shows the final grade for students in two different classes Class 2 a) Identify each of the following statements as TRUE or FALSE: Class 1 -- 50% of Class 2 performed at or above 75% of Class 1: True/False 30 40 50 60 70 80 90 100 110 120 Grade You are more likely to achieve below a 60% if you are in Class 2: True/False The AVERAGE class grade will be lower for Class 1: True/False The median grade is higher for Class 1: True/False b) If your goal was to achieve between 80% and 100%, which class would you be more likely to have met your goal? Justify your answer using the components of the box and whisker plot.