Sales of SUVs (sport utility vehicles) in the United States (in millions) for the years 1990-1999 can be modeled by the quadratic equation shown below.
y = 0.016x^2 + 0.124x + 0.787
Here x=0 represents 1990, x=1 represents 1991, and so on. Use the model to approximate sales in 1998.
If x = 0 is 1990, x = 1 is 1991, then 1998 is represented by x = 8. Substitute this value of x into the quadratic equation to find y: y = 0.016*(8^2) + 0.124*8 + 0.787 = 1.024 + 0.992 + 0.787 = 2.803 Therefore, there were approximately 2.803 million SUVs sold in 1998.
