SOLUTION: The following table gives the number of traffic accidents in the U.S. for various years. Year- (2012;2013;2014;2015;2016) # of accidents (in millions)- (15.4;15.9;16.3;16;15.7)

Question 1139083: The following table gives the number of traffic accidents in the U.S. for various years.
Year- (2012;2013;2014;2015;2016) # of accidents (in millions)- (15.4;15.9;16.3;16;15.7)
a. Code the years using t=0 for 2012 and fit a quadratic formula to the data with the regression program on your calculator. What is the equation?
b. Predict the # of accidents in 2020.

Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
STAT EDIT, put 0-4 in column L1 and the other data in L2
STAT CALC quadreg
get a=-0.164
b=0.727
c=15.39
so equation is -.164 x^2+.727x+15.39
in 2020, x=8 (or t=8)
f(8)=10.71 million accidents
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