Because elderly people may have difficulty standing to have their heights measured, a study looked at predicting overall height from height to the knee. The data (in centimeters) for six elderly men is given below.

Knee height	57.7	47.7	43.5	44.8	55.2	54.7
Height	192.1	153.3	146.4	162.7	169.1	177.8

The correlation coefficient for these data is .89 and the least-squares regression line is.

For each additional centimeter of knee height, we can expect the height of the man to increase by