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The least-squares regression equation is $y^ =692.1x+15,511$ 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 0.7746 . Complete parts (a) through (d). (a) Predict the median income of a region in which $30%$ of adults 25 years and older have at least a bachelor's degree. \$ (Round to the nearest dollar as needed.)

solution:

To predict the median income of a region with of adults years and older having at leas...

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