An instructor at Arizona State University asked a random sample of eight students to record their study times in a beginning calculus course. She then made a table for total hours studied (x) over 2 weeks and test score ( y) at the end of the 2 weeks. Here are the results. For part (g), predict the score of a student who studies for 15 hours.

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X y 10 22 15 12 20 8 16 14 92 81 84 74 85 80 84 80