簡單線性回歸解答,答案 Y = a + bX
b = (10*416 - 52*32) / (10*696 - 52^2) = 0
a = 8
答案: Y = 8 + 0 * X
曲線線性回歸解答,答案 Y = AX^2 + BX + C
134688A + 9568B + 696C = 5568
9568A + 696B + 52C = 416
696A + 52B + 4C = 32
答案: Y = 0X^2 + 0X + 8
| 項次 | X | Y | X^2 | XY | Y^2 | X^2Y | X^3 | X^4 |
|---|---|---|---|---|---|---|---|---|
| 1 | 10 | 7 | 100 | 70 | 49 | 700 | 1000 | 10000 |
| 2 | 12 | 11 | 144 | 132 | 121 | 1584 | 1728 | 20736 |
| 3 | 14 | 5 | 196 | 70 | 25 | 980 | 2744 | 38416 |
| 4 | 16 | 9 | 256 | 144 | 81 | 2304 | 4096 | 65536 |
| 合計 | 52 | 32 | 696 | 416 | 276 | 5568 | 9568 | 134688 |