Fit curves (2) and (7) and a cubic parabola by least squares to (x, y) = (-2,
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Fit curves (2) and (7) and a cubic parabola by least squares to (x, y) = (-2, -30), (-1, -4), (0, 4), (1, 4), (2, 22), (3, 68). Graph these curves and the points on common axes. Comment on the goodness of fit.
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