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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.

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.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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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 9 10 20 30 40 SO 60 70 80 90 10071 Brightness Levet Use technology (like Google Sheets) to calculate r, the correlation coefficient. Round to two places after the decimal. r = 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. MacBook A esc 20 000 F1 F2 F3 F4 $ % 2 3 4 5 6 Nは に
Transcribed Image Text: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 9 10 20 30 40 SO 60 70 80 90 10071 Brightness Levet Use technology (like Google Sheets) to calculate r, the correlation coefficient. Round to two places after the decimal. r = 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. MacBook A esc 20 000 F1 F2 F3 F4 $ % 2 3 4 5 6 Nは に
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