Concept explainers
Repeat Problem 21 for the points (−1, −2), (0, 1), (1, 2), and (2, 0).
21. To find the coefficients of the parabola
that is the “best” fit to the points (1, 2), (2, 1), (3, 1), and (4, 3), minimize the sum of the squares of the residuals
by solving the system of normal equations
for a, b, and c. Graph the points and the parabola.
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