suvs 9.4 # 11

Question

Sales of SUVs? (sport utility? vehicles) in the United States ?(in millions) for the years? 1990-1999 can be modeled by the quadratic function shown below.
 
?f(x)=0.016x2+0.124x+0.787
 
Here x=0
represents? 1990, x=1 represents? 1991, and so on. Use the model to approximate sales in 1999.

Answer 1

For the year 1999, the value of x=9  [that is, 1999=1990+9].  To calculate a value for sales, simply plug in the value of x for that year.  Here are some values:

 

 year    x      sales (in millions)

1990    0           0.787
1991    1           0.927
1992    2           1.099
1993    3           1.303
1994    4           1.539
1995    5           1.807
1996    6           2.107
1997    7           2.439
1998    8           2.803
1999    9           3.199