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Para el la tabla Numero 4

x | y | x*y | x^2 | x^2*y | X^3 | X^4 |
1 | 2,5 | 2,5 | 1 | 2,5 | 1 | 1 |
2,3 | 6,4 | 14,72 | 5,29 | 33,856 | 12,167 | 27,9841 |
3,6 | 9 | 32,4 | 12,96 | 116,64 |46,656 | 167,9616 |
4,9 | 13,4 | 65,66 | 24,01 | 321,734 | 117,649 | 576,4801 |
6,2 | 18 | 111,6 | 38,44 | 691,92 | 238,328 | 1477,6336 |
7,5 | 20,3 | 152,25 | 56,25 | 1141,875 | 421,875 |3164,0625 |
8,8 | 22 | 193,6 | 77,44 | 1703,68 | 681,472 | 5996,9536 |
10,1 | 25,1 | 253,51 | 102,01 | 2560,451 | 1030,301 | 10406,0401 |
11,4 | 31 | 353,4 | 129,96 | 4028,76 | 1481,544 | 16889,6016|
12,7 | 32,2 | 408,94 | 161,29 | 5193,538 | 2048,383 | 26014,4641 |
68,5 | 179,9 | 1588,58 | 608,65 | 15794,954 | 6079,375 | 64722,1813 |

Recta mínima cuadrada:

Y=b+m.x
ParaDesarrollando

M=2.62863
B= -0.166129
Y(X) -0.166129+2.6263X

Para el la tabla Numero 5

x | y | x*y | x^2 | x^2*y | X^3 | X^4 |
-6.1 | 42.5 | -259.25 | 37.21 | 1581.425 | -226.981 | 1384.5841 |-5.4 | 31.3 | -169.02 | 29.16 | 912.708 | -157.464 | 850.3056 |
-4.2 | 17.6 | -73.92 | 17.64 | 310.464 | -74.088 | 311.1696 |
-2.8 | 6.4 | -17.92 | 7.84 | 50.176 | -21.952 | 61.4656 |
-2.8 |6.4 | -17.92 | 7.84 | 50.176 | -21.952 | 61.4656 |
-1.7 | 3 | -5.1 | 2.89 | 8.67 | -4.913 | 8.3521 |
-0.6 | 0.8 | -0.48 | 0.36 | 0.288 | -0.216 | 0.1296 |
0.5 | 0.7 | 0.35 | 0.25 | 0.175 | 0.125| 0.0625 |
1.6 | 2.2 | 3.52 | 2.56 | 5.632 | 4.096 | 6.5536 |
2.7 | 7.9 | 21.33 | 7.29 | 57.591 | 19.683 | 53.1441 |
3.8 | 15.1 | 57.38 | 14.44 | 218.044 | 54.872 | 208.5136 |
4.8 | 24 |115.2 | 23.04 | 552.96 | 110.592 | 530.8416 |
6 | 41 | 246 | 36 | 1476 | 216 | 1296 |
-4.2 | 198.9 | -99.83 | 186.52 | 5224.309 | -102.198 | 4772.5876 |
| | | | | | |
| | | | | | |Recta mínima cuadratica:

198.9=a*13+b*(-4.2)+c*(186.52) …(I)
-99.83=a*(-4.2)+ b*(186.52)+c*(-102.198) …(II)
5224.309=a*(186.52)+ b*(-102.198)+c*(4772.5876) …(III)
Solucion
a= b=...