11. (5%) Find the parabola y = a + b x + c x2that comes closest (least squares error) to the data points: (x, y) = (-2, 0), (-1, 0), (0, 1).(1, 2), and (2, 0). (A) (B)(C) (D) (E)

4. (5%) Let A be an m by n matrix. Which statement is TRUE? (A) The null space of A is a subspace of the column space of AT (B) The dimension of the null space of A plus the dimension of the row space of A is (C) The null space of AT equals column space of A (D) The column space of A is orthogonal to the row space of AT (E) The direct sum of the row space of A and the null space of AT is Rm

11. (5%) Find the parabola y = a + b x + c x²that comes closest (least squares error) to the data points: (x, y) = (-2, 0), (-1, 0), (0, 1).(1, 2), and (2, 0).
(A)
(B)
(C)
(D)
(E)

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