The table shows the number of cars manufactured in thousands by a company for selected years. Use a calculator to write a quartic model for the number of cars manufactured in a given year since 2000. Then use the model to estimate the number of cars manufactured in 2011. Answers:
f(x) ≈ 0.808x3 + 21.028x2 − 187.403x + 373.988
The estimated number of cars manufactured in 2011 is about 218.

f(x) ≈ 0.135x4 + 3.807x3 − 36.285x2 + 118.073x − 213.2
The estimated number of cars manufactured in 2011 is about 215.

f(x) ≈ 0.135x4 − 3.807x3 + 36.285x2 − 118.073x + 213.2
The estimated number of cars manufactured in 2011 is about 215.

f(x) ≈ 0.808x3 − 21.028x2 + 187.403x − 373.988
The estimated number of cars manufactured in 2011 is about 218.