The least-squares regression equation is y = 787.1x + 12,501 where y is the median income and x is the percentage of 25 years and older with at least a bachelor's degree in the region. The scatter diagram indicates a linear relation between the two variables with a correlation coefficient of 0.7332. Complete parts (a) through (d). Dound to th Median Income (a) Predict the median income of a region in which 20% of adults 25 years and older have at least a bachelor's degree. 55000- 20000+ 15 20 25 30 35 40 45 50 55 60 Bachelor's %