Frank is investigating how long his phone's battery lasts (in hours) for various brightness levels (on a scaleof 0-100). His data is displayed in the table and graph below.Brightness Level (x)Hours (y)374.7394.6425.5505.9643.8711.8823.1932.36.8.716.5-10 20 30 40 50 60 70 80 90 100 ll-14Brightness Levela) Find the equation for the line of best fit. Keep at least 3 decimals for each parameter in the equation.b) Interpret the slope in context.O Frank should expect -0.0566 hours per brightness level.O Frank should expect -0.0566 brightness level per hour.c) What does the equation predict for the number of hours the phone will last at a brightness level of 55?hours

Given data : Sr no X Y 1 37 4.7 2 39 4.6 3 42 5.5 4 50 5.9 5 64 3.8 6 71 1.8…

Answered: Frank is investigating how long his…

Trigonometry (MindTap Course List)

10th Edition

ISBN:9781337278461

Author:Ron Larson

Publisher:Ron Larson

Chapter5: Exponential And Logarithmic Functions

Section5.5: Exponential And Logarithmic Models

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Find the mean hourly cost when the cell phone described above is used for 240 minutes.
Before you attempt this question, on your graphing calculator hit MODE and turn STATDIAGNOSTICS on! (Or hit 2nd-0 and find Diagnosticon in the catalog.) Juwan 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. How's Brightness Level (x) Hours (y) 20 7 6 5 A 5 N 1 37 37 39 42 61 64 66 76 4.3 4.5 4.2 5.6 3.3 4.2 2.7 3.6 10 20 30 40 50 60 70 80 90 100 11 Brightness Level a) Find the equation for the line of best fit. Keep at least 4 decimals for each parameter in the equation. (You should begin by typing y=) b) Interpret the slope in context. ● Juwan should expect -0.0366 brightness level per hour. Juwan should expect -0.0366 hours per brightness level. c) What does the equation predict for the number of hours the phone will last at a brightness level of 42? hours d) Calculate the correlation coefficient r.
An individual’s income varies with his or her age. The following table shows the median income I of males of different age groups within the United States for 2012. For each age group, let the class midpoint represent theindependent variable, x. For the class “65 years and older,” we will assume that the class midpoint is 69.5. (a) Use a graphing utility to draw a scatter diagram of thedata. Comment on the type of relation that may existbetween the two variables.(b) Use a graphing utility to find the quadratic function ofbest fit that models the relation between age and medianincome.(c) Use the function found in part (b) to determine the age atwhich an individual can expect to earn the most income.(d) Use the function found in part (b) to predict the peakincome earned.(e) With a graphing utility, graph the quadratic function ofbest fit on the scatter diagram.
ONLY DO PART A Burning fuels in power plants and motor vehicles emit carbon dioxide (CO2), contributing to global warming. The table at the right displays CO2 emissions per person from countries with at least 20 million populations. (a) What is the variable of interest? How do you classify it? (b) Make a histogram of the data using classes of width 2, starting at 0. Show the frequency distribution table and create the Histogram of the data. Be mindful of submitting a correct graph. (c) Describe the shape, center, and spread of the distribution. Which countries are outliers? For a description of the shape, center, and spread, put your response in paragraph form. Select the most appropriate measure of center and measure of spread to describe the distribution. Also, do not forget to interpret the values based on the given context. Lastly, do not forget to include the unit of measurements. For outliers, show your method of how you were able to determine these. What can you say about…
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Which univariate graph for frequency would be reasonable to use to depict continuous data? Histogram or bar or pie chart
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For each variable, determine whether it is best thought of as discrete or continuous. Variable Discrete Continuous (a) The number of personal-injury traffic accidents last week on Interstate 65 in Indiana O O (b) The number of students, in a class of 35, who improve their score from the first midterm to the second midterm O (c) The intensity of a 1000-Hz tone judged by a participant to be "equally as loud as" a 500-Hz tone of 50 decibels O (d) The number of damaged chromosomes on a petri dish following irradiation acer ^ esc ! 1 2 # 3 4 % 5 t 6 7 y O U O O X 5 ?
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