Case Study: Modeling with Elementary Functions: Quiz


Problem 5

Use the SSE criterion to decide which cubic best fits these data points:

x y
–2 0.8
–1 1
0 0
1 0
2 2.8
3 10
4 20

C1(x) = 0.4x3 – 2x
C2(x) = 0.4x3 – x + 5x2


Answers, problem 5

SSE for C1(x) = 48.68, SSE for C1(x) = 97.63, so C1(x) is a better fit.


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