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On a particular summer day the outdoor temperature was recorded at 8 times of the day and the following table was compiled. A scatterplot was

On a particular summer day the outdoor temperature was recorded at 8 times of the day and the following table was compiled. A scatterplot was produced and the parabola of best fit was determined.

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t= 90 Time y = Outdoor 80 Temperature of day Temperature (hour) (degrees F.) 70 on a Summer Day 7 52 60 9 67 11 73 40 y = -0.3476t2 + 10.948t - 6.0778 R2 = 0.9699 13 76 Temperature (degrees) 30 14 78 20 17 79 10 20 76 O 23 61 0 4 12 16 20 24 Time of Day (hour)

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