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Hunter is investigating how long his phone s battery lasts in hours for various brightness...

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Hunter is investigating how long his phone s battery lasts in hours for various brightness levels on a scale of 0 100 His data is displayed in the table and graph below Brightness Level x Hours y 10 9 8 7 6 5 Hours A m 2 1 10 20 30 20 23 24 32 46 50 57 66 5 2 6 5 5 2 5 3 2 9 4 5 3 6 2 8 60 70 80 90 100 11 40 50 Brightness Level a Find the equation for the line of best fit Keep at least 4 decimals for each parameter in the equation

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