Example 3.5 Consider Ꮖ ; -2 -1 0 1 2 3 Yi 1 -1 -4 -0.6 Approximate the data using least squares method 1 3 with a) R(x) = a + bx, a, bЄ R; b) R(x) = a + bx + cx², a, b, c Є R.
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