Cheick 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)236.7275.9307.3367.2713.8723.6853.1941.9 (a) Use the Corr/Regression to find the equation for the line of best fit. Round your answers to two decimal places. ˆy= 8.74 + -0.07x(b) Interpret the slope in context. Cheick expects the battery life to go down by 0.07 hours for each increase of 1 in the brightness level.Cheick expects the brightness to decrease by 0.07 for every hour that goes by.Cheick expects his phone battery to last 0.07 hours if he keeps the brightness level at 0.Cheick expects his phone battery to last 8.74 hours if he keeps the brightness level at 0.Correct (c) What does the equation predict for the number of hours the phone will last at a brightness level of 36? 6.2 hours Round your answer to one decimal place.

Given Information: The data for the brightness level and the number of hours the phone's battery…

Answered: heick is investigating how long his…

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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Question

Cheick 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)
23	6.7
27	5.9
30	7.3
36	7.2
71	3.8
72	3.6
85	3.1
94	1.9

(a) Use the Corr/Regression to find the equation for the line of best fit. Round your answers to two decimal places.
ˆy

= 8.74 + -0.07x

(b) Interpret the slope in context.

Cheick expects the battery life to go down by 0.07 hours for each increase of 1 in the brightness level.
Cheick expects the brightness to decrease by 0.07 for every hour that goes by.
Cheick expects his phone battery to last 0.07 hours if he keeps the brightness level at 0.
Cheick expects his phone battery to last 8.74 hours if he keeps the brightness level at 0.

Correct

(c) What does the equation predict for the number of hours the phone will last at a brightness level of 36?

6.2 hours Round your answer to one decimal place.

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