Zach is investigating how long his phone's battery lasts (in hours) for various brightness levels (on a scale of 0−100).

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Zach Is Investigating How Long His Phone S Battery Lasts In Hours For Various Brightness Levels On A Scale Of 0 100 1 (64.57 KiB) Viewed 32 times

Zach Is Investigating How Long His Phone S Battery Lasts In Hours For Various Brightness Levels On A Scale Of 0 100 2 (39.77 KiB) Viewed 32 times

Zach Is Investigating How Long His Phone S Battery Lasts In Hours For Various Brightness Levels On A Scale Of 0 100 3 (79.18 KiB) Viewed 32 times

Zach 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. a) Find the equation for the line of best fit. Keep at least 4 decimals for each parameter in the equation. b) Interpret the slope in context. Zach should expect −0.047 hours per brightness level. Zach should expect −0.047 brightness level per hour. c) What does the equation predict for the number of hours the phone will last at a brightness levet of 18? hours d) What is the residual for the point (18,7.4) ? hours Question Help: Video D Post to forum
Linear Functions and Applications Which of the following statements are true when creating an approximate linear model for a given data set? Check all that apply. It can only be done if the data is perfectly linear. It is called Linear Regression It provides a way to make predictions on data points outside the given data set. It is called Finding the Line of Best Fit
The following scatter plot shows the weight (in pounds) and the number of hours slept in a day by a random sample of infants. A pediatrician wants to know if there is any correlation between these two factors. Infants' weights and their number of hours of sleep (a) The independent variable is (b) The dependent variable is Round your answer for part (c) to 2 decimal places. (c) The value of the correlation coefficient is (d) There is a corretation between an infant's weight and their number of hours of sleep. State the numerical part of your answer for part (e) accurate to 4 decimal places. (e) With every pound increase in an infant's weight, the number of hours of sleep by hours. Round your answers for parts (f), (g) to 2 decimal places and express your answers in percentage form (i.e. 3.00% instead of 0.03 ). (f) What nercentage of total variation in the number of hours slept in infants can be explained by their weight? (o) Pradict the number of hours of sleep in a day by an infant who weighs 9 pounds. Question Help: D Post to forum