Previous Question The least-squares regression equation is :1 = 686.7x + 16,457 where y - . u . d 55000' Q x is the percentage of 25 years and older with at least a bachelors degree in the region. The E scatter diagram indicates a linear relation between the two variables with a correlation coefcient Q of 0.7962. Complete parts (a) through (d). E . . 2% I w ' \"t ' .' . I l3 2 . . 25000 > 15 20 25 30 35 40 45 50 55 60 Bachelor's% (a) Predict the median income of a region in which 25% of adults 25 years and older have at least a bachelor's degree. $|:| (Round to the nearest dollar as needed.)