A representative cross section of several thousand husband-wife pairs is obtained. Looking at the ages, the average age of the husbands is 46 years and the average age of the wives is 43 years, with both groups having the same standard deviation of 13 years. The linear correlation coefficient between the ages of husband and wife is 0.95. The scatterplot is elliptical.
Compute the slope and y-intercept of the least squares regression line for predicting the age of a husband from the age of his wife.