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Open the file Cars and Trucks.
a. Make a scatter graph of the data with a trendline, equation, and R2 value. Copy and paste your graph here.
b. Is the data linear? Explain why or why not?
c. Use the equation of the trendline to predict how many cars there will be in the US in the year 2013. How confident are you in this prediction? Why?
d. Use the equation of the trendline to predict the number of cars in US in 2050. How confident are you in this prediction? Why?
e. Use the equation of the trendline to predict when there were no cars in the US. How confident are you in this prediction? Why?
Years
Number (millions)
1970
103.45
1975
127.12
1980
149.48
1985
165.10
1990
181.98
1991
181.33
1992
183.67
1993
187.32
1994
190.79
1995
194.13
1996
198.86
1997
199.97
1998
203.17
1999
207.79
2000
212.71
2001
221.82
2002
220.93
2003
222.86
2004
228.28
2005
231.90
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