Tauri 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) Hours Click Download CSV to download csv file of data or copy/paste the data into Excel. After downloading the file, you may want to save it as an Excel Workbook. 8 7 6 5 ch C₂ H 10 20 30 18 23 26 35 37 4.3 5.5 5.7 3.7 5.7 5.3 • 40 50 60 Brightness Level 44 73 94 2.5 3.7 70 ● 80 90 100 11 a b. Interpret the slope in context. Tauri should expect a. Find the equation for the line of best fit. Keep at least 4 decimals for each parameter in the equation. Note the negative sign in the middle of equation. ? ✓ Obrightness level goes up by 0.0329 per additional hour. Obrightness level goes down by 0.0329 per additional hour. O hours go down by 0.0329 per each additional brightness level. hours go up by 0.0329 per each additional brightness level. a

Algebra and Trigonometry (6th Edition)
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ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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Tauri 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)
Hours
Click Download CSV to download csv file of data or copy/paste the data into Excel. After downloading the
file, you may want to save it as an Excel Workbook.
ch
8
7
6
5
Cu
10
●
20
18 23 26 35 37 44 73 94
5.5 5.7 3.7 5.7 5.3 3.7 2.5
4.3
30
•
40 50 60
Brightness Level
70
●
80 90 100 11
q
a. Find the equation for the line of best fit. Keep at least 4 decimals for each parameter in the
equation. Note the negative sign in the middle of equation.
? ✓
b. Interpret the slope in context. Tauri should expect
Obrightness level goes up by 0.0329 per additional hour.
Obrightness level goes down by 0.0329 per additional hour.
O hours go down by 0.0329 per each additional brightness level.
O hours go up by 0.0329 per each additional brightness level.
B
Transcribed Image Text:Tauri 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) Hours Click Download CSV to download csv file of data or copy/paste the data into Excel. After downloading the file, you may want to save it as an Excel Workbook. ch 8 7 6 5 Cu 10 ● 20 18 23 26 35 37 44 73 94 5.5 5.7 3.7 5.7 5.3 3.7 2.5 4.3 30 • 40 50 60 Brightness Level 70 ● 80 90 100 11 q a. Find the equation for the line of best fit. Keep at least 4 decimals for each parameter in the equation. Note the negative sign in the middle of equation. ? ✓ b. Interpret the slope in context. Tauri should expect Obrightness level goes up by 0.0329 per additional hour. Obrightness level goes down by 0.0329 per additional hour. O hours go down by 0.0329 per each additional brightness level. O hours go up by 0.0329 per each additional brightness level. B
c. What does the equation predict for the number of hours the phone will last at a brightness level of
37?
Round properly to 1 decimal place.
hours
d. What is the residual if the phone battery lasts 5.7 hours when the brighness level is 37?
Round properly to 1 decimal place.
hours
Transcribed Image Text:c. What does the equation predict for the number of hours the phone will last at a brightness level of 37? Round properly to 1 decimal place. hours d. What is the residual if the phone battery lasts 5.7 hours when the brighness level is 37? Round properly to 1 decimal place. hours
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