Here are the correct answers.
| x | 1 | 2 | 3 | 4 |
| y Observed | 1.5 | 1.6 | 2.1 | 3.0 |
| y Predicted | 0.5(1)+1 = 1.5 | 0.5(2)+1 = 2.0 | 0.5(3)+1 = 2.5 | 0.5(4)+1 = 3.0 |
| Residue | 1.5-1.5 = 0 | 1.6-2.0 = -0.4 | 2.1-2.5 = -0.4 | 3.0-3.0 = 0 |
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