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Gerardo 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) 17 2737 6.4 3.9 5.3 47 50 60 62 81 4.4 5.3 3.6 4.5 2.2 9 9+ 8 7 6 . 5 4 Hours 3 N 1 70 80 90 100 111 10 20 30 40 50 60 Brightness Level What is the residual for the point (50,5.3)? hours Question Help: D Video

4500 19.5 3000 31.4 3500 28 4000 23.6 3500 28 2500 40.9 3500 32.6 a) The symbol and value of the correlation coefficient are as follows: Round final answer to 4 decimal places. r 0% = -0.929 Interpret this value: O linear relation between weight • There is a strong negative and mileage for cars. b) The symbol and value of the coefficient of determination are as follows: Round final answer to 4 decimal places. R? .863041 Interpret this value: can be About 86.30 86.3 % of the variation in mileage On explained by the linear model and weight c) Find the standard error of estimate. Round final answer to 4 decimal places. tarrat +biela