x | 825 | 215 | 1 070 | 550 | 480 | 920 | 1 350 | 325 | 670 | 1 215 |
y | 3.5 | 1.0 | 4.0 | 2.0 | 1.0 | 3.0 | 4.5 | 1.5 | 3.0 | 5.0 |
x | 825 | 215 | 1 070 | 550 | 480 | 920 | 1 350 | 325 | 670 | 1 215 |
y | 3.5 | 1.0 | 4.0 | 2.0 | 1.0 | 3.0 | 4.5 | 1.5 | 3.0 | 5.0 |
解析:=
=762,
=1 297 860,
=2.85,
=4 680.6,
b==0.003 606,
a==0.102 2.∴回归直线方程为
=0.102 2+0.003 606x.
答案:=0.102 2+0.003 606x