Roy 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)265.952544.6652.3772.595910 20 30 40 SO 60 70 80 90 10071Brightness LevetUse technology (like Google Sheets) to calculate r, the correlation coefficient. Round to two places after thedecimal.r =Based on the correlation coefficient, describe the strength and direction of the association. a) In general, what isthe relationship between brightness level and battery life? b) How strong is this effect? c) Does this relationshipbetween brightness level and battery life make sense to you? Explain.MacBook Aesc20000F1F2F3F4$%23456Nはに

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Roy 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) 26 5.9 52 54 4.6 65 2.3 77 2.5 95 -7- -2 I0 20 30 40 so 60 70 NO 90 1007 Brightners tavet Use technology (like Google Sheets) to calculate r, the correlation coefficient. Round to two places after the decimal. Based on the correlation coefficient, describe the strength and direction of the association. a) In general, what is the relationship between brightness level and battery life? b) How strong is this effect? c) Does this relationship between brightness level and battery life make sense to you? Explain.