Diagrama ingenieril

| x | y | x2 | xy |
| 0 | 0 | 0 | 0 |
| 0.5 | 26 | 0.25 | 13 |
| 1 | 61 | 1 | 61 |
| 1.5 | 102 | 2.25 | 153 |
| 2 | 151 | 4 | 302 |
| 2.5 | 157 | 6.25 | 392.5 |
| | | | |
∑| 7.5 | 497 | 13.75 | 921.5 |

a1=nxiyi-xiyinxi2-xi2
a0=y-a1x
→y=a1x+a0
De los datos anteriores obtenemos:
a1=6921.5-7.5497613.75-7.52=240235
a0=4976-2402357.56=-6221
→y=240235∙x-6221y=7206∙x-310105

| x | y | x2 | x3 | x4 | xy | x2y |
| 4 | 157 | 16 | 64 | 256 | 628 | 2512 |
| 4.5 | 165 | 20.25 | 91.125 | 410.0625 | 742.5 | 3341.25 |
| 5 | 176 | 25 | 125 | 625 | 880 | 4400 || 5.5 | 179 | 30.25 | 166.375 | 915.0625 | 984.5 | 5414.75 |
| 6 | 183 | 36 | 216 | 1296 | 1098 | 6588 |
| 6.5 | 190 | 42.25 | 274.625 | 1785.0625 | 1235 | 8027.5 |
| 7 | 194 | 49 | 343 |2401 | 1358 | 9506 |
| 7.5 | 201 | 56.25 | 421.875 | 3164.0625 | 1507.5 | 11306.25 |
| 8 | 201 | 64 | 512 | 4096 | 1608 | 12864 |
| 8.5 | 203 | 72.25 | 614.125 | 5220.0625 | 1725.5 |14666.75 |
| 9 | 205 | 81 | 729 | 6561 | 1845 | 16605 |
| 9.5 | 207 | 90.25 | 857.375 | 8145.0625 | 1966.5 | 18681.75 |
| 10 | 210 | 100 | 1000 | 10000 | 2100 | 21000 |
| 10.5 | 211 | 110.25 |1157.625 | 12155.0625 | 2215.5 | 23262.75 |
| 11 | 213 | 121 | 1331 | 14641 | 2343 | 25773 |
| 11.5 | 213 | 132.25 | 1520.875 | 17490.0625 | 2449.5 | 28169.25 |
| 12 | 213 | 144 | 1728 | 20736| 2556 | 30672 |
| 12.5 | 227 | 156.25 | 1953.125 | 24414.0625 | 2837.5 | 35468.75 |
| 13 | 227 | 169 | 2197 | 28561 | 2951 | 38363 |
| 13.5 | 232 | 182.25 | 2460.375 | 33215.0625 | 3132 |42282 |
| 14 | 232 | 196 | 2744 | 38416 | 3248 | 45472 |
| 14.5 | 232 | 210.25 | 3048.625 | 44205.0625 | 3364 | 48778 |
| 15 | 232 | 225 | 3375 | 50625 | 3480 | 52200 |
| 15.5 | 232 | 240.25| 3723.875 | 57720.0625 | 3596 | 55738 |
| 16 | 236 | 256 | 4096 | 65536 | 3776 | 60416 |
| 16.5 | 236 | 272.25 | 4492.125 | 74120.0625 | 3894 | 64251 |
| 17 | 236 | 289 | 4913 | 83521 |...