In the following data, x is the average number of hours the student spent working on math each week and y is the final grade in a math class. | hours/week x | Grade y | | :--- | :--- | | 5 | 48 | | 8 | 70.2 | | 10 | 69 | | 11 | 79.4 | | 11 | 76.4 | | 14 | 75.6 | | 15 | 91 | | 17 | 85.8 | | 19 | 99.6 | | 19 | 100 | The line of best fit is y = 3.14 * x + 39.01. What is the predicted value for the final grade when a student spends an average of 9 hours each week on math? Grade = Round to 1 decimal place.
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