(2000•河南)某下岗职工购进一批货物,到集贸市场零售,已知卖出的货物数量x与售价y的关系如表所示:
写出用x表示y的公式是 .
0 169324 169332 169338 169342 169348 169350 169354 169360 169362 169368 169374 169378 169380 169384 169390 169392 169398 169402 169404 169408 169410 169414 169416 169418 169419 169420 169422 169423 169424 169426 169428 169432 169434 169438 169440 169444 169450 169452 169458 169462 169464 169468 169474 169480 169482 169488 169492 169494 169500 169504 169510 169518 366461
| 质量x(千克) | 1 | 2 | 3 | 4 | 5 |
| 售价y(元) | 2+0.1 | 4+0.2 | 6+0.3 | 8+0.4 | 10+0.5 |