Question

Please help me with these 3 questions with a picture of your graphing calculator. Thank you!!!

1) Use your graphing calculator to solve the system of equations below. Set your window to-3 Sx$3 and 3 sys 3. Use the intersect feature to calculate the intersection of the two lines. Paste your graph below, making sure the intersection point is clearly labeled. 1-2に7iiii 2) Use your graphing calculator to graph the system of inequalities below. (Hint: You can take care of the 3"t and 4 inequalities by setting your window correctly. Paste the graph below. x+2ys 10 3x+2y s12 x20 y20 The number of cell phone Cell Phone 3) 985) and seprest the aumber of sdbacrbers Source CTIA-The Wire 3) Cell Phone The number of cell phone subscribers in the U.S. for the years of 198s through 2010 is given in the table. Let x N(x) represent the number of subscribers. (Source CTIA-The Wireless As- 195 i986 1987 1988 1989 1990 1991 Number Near 1993 1994 1995 19%| 1997 1998 1999 2000 Year2001 2002 20032004 2005 2006 2007 2008 Sumber 2009 2010 Number 2766 3005 a) Use this data set to construct a cubic model (funchon) that relates the year to the annual number of u.S. cell phone subscribers for the years 1985 through 2010. Make sure to paste the graph of the model and its equation below together. b) Use this model to predict the actual number of U.s, cell phone subscribers in the year 2000. Does the predicted value underestimate or overestimate the actual value? By how much c) The actual population in the U.S. in 2012 was about 300 million. What is the significance of the fact that the model shows there were 300.5 million subscribers in 2012? Explain in 2-3 each year through the years of 1985 through 2010 is given in the table. Let x represent the number of years from 1985 (so that x = 0 represents 1985) and N(x) represent the number of subscribers. (Source CTIA-The Wireless As- sociation) Year 1985 1986 1987 1988 19891990 1991 1992 Number0.3 0.7 12 3553 76 11.0 16.0 Year 1993 1994 1995 1996 1997 1998 1999 2000 20 24.1 338440 553 69.2 860 1095 Number20 2001 2002 2003 2004 2005 2006 2007 2008 Number 128 3 14081587 1821 2079 2330 250.0 2627 2009 2010 Namber2766 3005

Answer 1

1. 32.-2y 7įs the only equation. It is not a system of equation

2.x > 0, y >0 indicate the graph is only on first quadrant