Because colas tend to replace healthier beverages and colas contain caffeine and phosphoric acid, researchers wanted to know whether cola consumption is associated with lower bone mineral density in women. The accompanying data lists the typical number of cans of cola consumed in a week and the femoral neck bone mineral density for a sample of 15 women.

Colas per week Bone Mineral Density (grams per cubic centimeter)

0 0.907

1 0.869

1 0.881

1 0.870

2 0.852

2 0.836

2 0.836

3 0.817

5 0.762

5 0.767

5 0.763

6 0.734

6 0.732

7 0.715

8 0.683

Find the least-squares regression line treating cola consumption per week as the explanatory variable.