Because elderly people may have difficulty standing to have their height measured, a study looked at the relationship between overall height and height to the knee. Here are data (in centimeters) for five elderly men:
| Knee Height | 56.4 | 45.8 | 40.9 | 47.6 | 58.4 |
| Height | 191.5 | 151.6 | 147.9 | 163.5 | 172.5 |
What is the equation of the least-squares regression line for predicting height from knee height?
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