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Mr. Hanson holds optional review sessions each year before his students take their final exam. He takes attendance at these sessions. In his notebook, Mr. Hanson writes down the number of sessions each student attends, x, and that student's score on the final exam, y. This is the regression line he finds for the data: y = 8.5x + 63.2 What does the value 63.2 in the equation of the regression line approximate? the score a student might expect without attending any review sessions the average score on the final exam the increase in a student's score for each review session attended the minimum score on the final exam