
Prealgebra (6th Edition)
6th Edition
ISBN: 9780134179018
Author: Jamie Blair, John Tobey Jr., Jeffrey Slater, Jenny Crawford
Publisher: PEARSON
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Chapter 9, Problem 61RP
Graph each equation.
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In Gallup's Annual Consumption Habits Poll, telephone interviews were conducted for a
random sample of 1014 adults aged 18 and over. One of the questions was, "How many
cups of coffee, if any, do you drink on an average day?" The following table shows the
results obtained (Gallup website, August 6, 2012).
Number of Cups
per Day
0
1
2
3
4 or more
Number of
Responses
365
264
193
91
101
Define a random variable x = number of cups of coffee consumed on an average day. Let
x=4 represent four or more cups.
a. Develop a probability distribution for x.
b. Compute the expected value of x.
c. Compute the variance of x.
d. Suppose we are only interested in adults who drink at least one cup of coffee on an
average day. For this group, let y = the number of cups of coffee consumed on an
average day. Compute the expected value of y and compare it to the expected value of x.
Ten major college football bowl games were played in January 2010, with the University
of Alabama beating the University of Texas 37 to 21 to become the national champion
of college football. The results of the 10 bowl games follow (USA Today, January 8, 2010).
Bowl Game
Score
Outback
Gator
Auburn 38 Northwestern 35
Florida State 33 West Virginia 21
Capital One
Penn State 19 LSU 17
Rose
Ohio State 26 Oregon 17
Florida 51 Cincinnati 24
Sugar
Cotton
Alamo
Fiesta
Mississippi State 21 Oklahoma State 7
Texas Tech 41 Michigan State 31
Boise State 17 TCU 10
Orange
Iowa 24 Georgia Tech 14
Championship
Alabama 37 Texas 21
Predicted
Point Margin
Actual
Point Margin
5
3
1
12
3
-2
14
3
9
-4
-3
4
229740706
14
10
10
16
The predicted winning point margin was based on Las Vegas betting odds approximately
one week before the bowl games were played. For example, Auburn was predicted to beat
Northwestern in the Outback Bowl by five points. The actual winning point margin for Au-
burn was three points. A…
Chapter 9 Solutions
Prealgebra (6th Edition)
Ch. 9.1 - Coffee Consumption Use the pictograph to answer...Ch. 9.1 - Coffee Consumption Use the pictograph to answer...Ch. 9.1 - Coffee Consumption Use the pictograph to answer...Ch. 9.1 - Coffee Consumption Use the pictograph to answer...Ch. 9.1 - Prob. 5ECh. 9.1 - Prob. 6ECh. 9.1 - Population Density Use this pictograph to answer...Ch. 9.1 - Prob. 8ECh. 9.1 - Population Density Use this pictograph to answer...Ch. 9.1 - Prob. 10E
Ch. 9.1 - Prob. 11ECh. 9.1 - Household Expenses The average household expenses...Ch. 9.1 - Prob. 13ECh. 9.1 - Prob. 14ECh. 9.1 - Prob. 15ECh. 9.1 - Prob. 16ECh. 9.1 - Prob. 17ECh. 9.1 - Prob. 18ECh. 9.1 - Prob. 19ECh. 9.1 - Prob. 20ECh. 9.1 - Prob. 21ECh. 9.1 - Emergency Room Visits In the United States...Ch. 9.1 - Prob. 23ECh. 9.1 - Prob. 24ECh. 9.1 - Prob. 25ECh. 9.1 - Prob. 26ECh. 9.1 - Prob. 27ECh. 9.1 - Prob. 28ECh. 9.1 - Prob. 29ECh. 9.1 - Prob. 30ECh. 9.1 - Prob. 31ECh. 9.1 - Prob. 32ECh. 9.1 - Prob. 33ECh. 9.1 - Prob. 34ECh. 9.1 - Prob. 35ECh. 9.1 - Prob. 36ECh. 9.1 - Prob. 37ECh. 9.1 - Prob. 38ECh. 9.1 - Prob. 39ECh. 9.1 - Monthly Precipitation The comparison line graph...Ch. 9.1 - Prob. 41ECh. 9.1 - Prob. 42ECh. 9.1 - Prob. 43ECh. 9.1 - Prob. 44ECh. 9.1 - Prob. 45ECh. 9.1 - Fat and Carbohydrates Use the table to make a...Ch. 9.1 - Life Insurance Use the information in the table to...Ch. 9.1 - Life Insurance Use the information in the table to...Ch. 9.1 - Mobile Device Accessories Use the information in...Ch. 9.1 - Mobile Device Accessories Use the information in...Ch. 9.1 - Sport Event Tickets Use the circle graph for...Ch. 9.1 - Perform the operation indicated. [6.1.4]...Ch. 9.1 - Prob. 53ECh. 9.1 - Perform the operation indicated. [6.4.2] Factor....Ch. 9.1 - Use the information in the table for exercises...Ch. 9.1 - Refer to the circle graph in exercise 51 to answer...Ch. 9.1 - Use the information in the table to construct a...Ch. 9.1 - Concept Check The college administration is...Ch. 9.2 - Prob. 1ECh. 9.2 - Prob. 2ECh. 9.2 - Prob. 3ECh. 9.2 - Prob. 4ECh. 9.2 - Prob. 5ECh. 9.2 - Prob. 6ECh. 9.2 - Prob. 7ECh. 9.2 - Prob. 8ECh. 9.2 - Prob. 9ECh. 9.2 - Prob. 10ECh. 9.2 - Prob. 11ECh. 9.2 - Sales Record The double-bar graph shows the number...Ch. 9.2 - Baseball The captain of the college baseball team...Ch. 9.2 - Bowling The captain of the college bowling team...Ch. 9.2 - Prob. 15ECh. 9.2 - Gasoline Mileage Cindy and Andrea traveled to...Ch. 9.2 - Prob. 17ECh. 9.2 - Prob. 18ECh. 9.2 - Prob. 19ECh. 9.2 - Prob. 20ECh. 9.2 - Prob. 21ECh. 9.2 - Prob. 22ECh. 9.2 - Prob. 23ECh. 9.2 - Prob. 24ECh. 9.2 - Prob. 25ECh. 9.2 - Prob. 26ECh. 9.2 - Cell Phone Usage The numbers of cell phone minutes...Ch. 9.2 - Swimmers' Ages The ages of 10 people swimming laps...Ch. 9.2 - Prob. 29ECh. 9.2 - Prob. 30ECh. 9.2 - Find the median value. Actors in a Play The...Ch. 9.2 - Find the median value. Football Injuries The...Ch. 9.2 - Prob. 33ECh. 9.2 - Find the mode. 86, 84, 86, 87, 84, 83, 90Ch. 9.2 - Prob. 35ECh. 9.2 - Find the mode. 144, 143, 140, 141, 149, 144, 141,...Ch. 9.2 - Prob. 37ECh. 9.2 - TVs Sold The last six flat-screen television sets...Ch. 9.2 - Find the mean, median, and mode for each set of...Ch. 9.2 - Prob. 40ECh. 9.2 - Find the mean, median, and mode for each set of...Ch. 9.2 - Find the mean, median, and mode for each set of...Ch. 9.2 - Study Time Dawn studies and completes homework for...Ch. 9.2 - Restaurant Ratings Sara's Seafood Place received...Ch. 9.2 - Use the table for exercises 45 and 46. Round to...Ch. 9.2 - Use the table for exercises 45 and 46. Round to...Ch. 9.2 - Monthly Salaries A local travel office has 10...Ch. 9.2 - Track Meet A college track star ran the 100-meter...Ch. 9.2 - Prob. 49ECh. 9.2 - Find the median value. 15.276; 21.375; 18.90;...Ch. 9.2 - Evaluate. [2.6.2] x2+4forx=26Ch. 9.2 - Evaluate. [2.6.2] 35x-9forx=7Ch. 9.2 - Evaluate. [2.6.2] 2x+1forx=5Ch. 9.2 - Evaluate. [2.6.2] 3x7forx=0Ch. 9.2 - [5.1.3]Roofing Cost Wesley is putting a new roof...Ch. 9.2 - [2.3.3]Mountain Altitude The highest mountain in...Ch. 9.2 - Find the average or mean quiz score for Jake if he...Ch. 9.2 - Find the median of each of the following. a. 17,...Ch. 9.2 - Find the mode of each of the following. a. Sara...Ch. 9.3 - Describe in words the directions you move on the...Ch. 9.3 - Describe in words the directions you move on the...Ch. 9.3 - Online Orders Use the line graph to answer...Ch. 9.3 - Prob. 4ECh. 9.3 - Prob. 5ECh. 9.3 - Prob. 6ECh. 9.3 - Plot and label the ordered pairs on the...Ch. 9.3 - Plot and label the ordered pairs on the...Ch. 9.3 - Prob. 9ECh. 9.3 - Plot and label the ordered pairs on the...Ch. 9.3 - Prob. 11ECh. 9.3 - Plot and label the ordered pairs on the...Ch. 9.3 - Prob. 13ECh. 9.3 - Plot and label the ordered pairs on the...Ch. 9.3 - Prob. 15ECh. 9.3 - Plot and label the ordered pairs on the...Ch. 9.3 - Plot and label the ordered pairs on the...Ch. 9.3 - Prob. 18ECh. 9.3 - Plot and label the ordered pairs on the...Ch. 9.3 - Plot and label the ordered pairs on the...Ch. 9.3 - Prob. 21ECh. 9.3 - Plot and label the ordered pairs on the...Ch. 9.3 - Give the coordinates of each point. KCh. 9.3 - Prob. 24ECh. 9.3 - Give the coordinates of each point. MCh. 9.3 - Prob. 26ECh. 9.3 - Give the coordinates of each point. OCh. 9.3 - Give the coordinates of each point. PCh. 9.3 - Give the coordinates of each point. QCh. 9.3 - Prob. 30ECh. 9.3 - Give the coordinates of each point. SCh. 9.3 - Prob. 32ECh. 9.3 - Prob. 33ECh. 9.3 - Give the coordinates of each point. VCh. 9.3 - Prob. 35ECh. 9.3 - Prob. 36ECh. 9.3 - Prob. 37ECh. 9.3 - Prob. 38ECh. 9.3 - Plot the points corresponding to each set of...Ch. 9.3 - Plot the points corresponding to each set of...Ch. 9.3 - Plot the points corresponding to each set of...Ch. 9.3 - Plot the points corresponding to each set of...Ch. 9.3 - Plot the points corresponding to each set of...Ch. 9.3 - Prob. 44ECh. 9.3 - Prob. 45ECh. 9.3 - Prob. 46ECh. 9.3 - Prob. 47ECh. 9.3 - Prob. 48ECh. 9.3 - Prob. 49ECh. 9.3 - Prob. 50ECh. 9.3 - Plot and label the ordered pairs on a rectangular...Ch. 9.3 - Prob. 2QQCh. 9.3 - Plot the points corresponding to each set of...Ch. 9.3 - Concept Check Line M passes through the points...Ch. 9.4 - Prob. 1ECh. 9.4 - Is (1,3) a solution to 2x+y=5? Why or why not?Ch. 9.4 - List four ordered pairs that are solutions to the...Ch. 9.4 - List four ordered pairs that are solutions to the...Ch. 9.4 - List four ordered pairs that are solutions to the...Ch. 9.4 - List four ordered pairs that are solutions to the...Ch. 9.4 - Prob. 7ECh. 9.4 - Prob. 8ECh. 9.4 - Prob. 9ECh. 9.4 - Prob. 10ECh. 9.4 - Use a chart to organize your work for exercises...Ch. 9.4 - Use a chart to organize your work for exercises...Ch. 9.4 - Use a chart to organize your work for exercises...Ch. 9.4 - Prob. 14ECh. 9.4 - Use a chart to organize your work for exercises...Ch. 9.4 - Use a chart to organize your work for exercises...Ch. 9.4 - Use a chart to organize your work for exercises...Ch. 9.4 - Use a chart to organize your work for exercises...Ch. 9.4 - Use a chart to organize your work for exercises...Ch. 9.4 - Use a chart to organize your work for exercises...Ch. 9.4 - Use a chart to organize your work for exercises...Ch. 9.4 - Use a chart to organize your work for exercises...Ch. 9.4 - Prob. 23ECh. 9.4 - Plot three ordered-pair solutions of the given...Ch. 9.4 - Plot three ordered-pair solutions of the given...Ch. 9.4 - Plot three ordered-pair solutions of the given...Ch. 9.4 - Prob. 27ECh. 9.4 - Prob. 28ECh. 9.4 - Plot three ordered-pair solutions of the given...Ch. 9.4 - Prob. 30ECh. 9.4 - Plot three ordered-pair solutions of the given...Ch. 9.4 - Prob. 32ECh. 9.4 - Plot three ordered-pair solutions of the given...Ch. 9.4 - Prob. 34ECh. 9.4 - Prob. 35ECh. 9.4 - Plot three ordered-pair solutions of the given...Ch. 9.4 - Prob. 37ECh. 9.4 - Prob. 38ECh. 9.4 - Prob. 40ECh. 9.4 - Prob. 41ECh. 9.4 - Prob. 42ECh. 9.4 - Prob. 43ECh. 9.4 - Prob. 44ECh. 9.4 - Prob. 1QQCh. 9.4 - Prob. 2QQCh. 9.4 - Prob. 3QQCh. 9.4 - Prob. 4QQCh. 9 - Course Enrollment Use this pictograph to answer...Ch. 9 - Course Enrollment Use this pictograph to answer...Ch. 9 - Prob. 3RPCh. 9 - Course Enrollment Use this pictograph to answer...Ch. 9 - Prob. 5RPCh. 9 - Prob. 6RPCh. 9 - Household Budget Nancy and Wally Worzowski's...Ch. 9 - Prob. 8RPCh. 9 - Prob. 9RPCh. 9 - Household Budget Nancy and Wally Worzowski's...Ch. 9 - Prob. 11RPCh. 9 - Household Budget Nancy and Wally Worzowski's...Ch. 9 - Population Growth The double-bar graph illustrates...Ch. 9 - Population Growth The double-bar graph illustrates...Ch. 9 - Population Growth The double-bar graph illustrates...Ch. 9 - Prob. 16RPCh. 9 - Population Growth The double-bar graph illustrates...Ch. 9 - Population Growth The double-bar graph illustrates...Ch. 9 - Population Growth The double-bar graph illustrates...Ch. 9 - Prob. 20RPCh. 9 - Trade-in Values vs Private Sale The comparison...Ch. 9 - Trade-in Values vs Private Sale The comparison...Ch. 9 - Trade-in Values vs Private Sale The comparison...Ch. 9 - Trade-in Values vs Private Sale The comparison...Ch. 9 - Trade-in Values vs Private Sale The comparison...Ch. 9 - Trade-in Values vs Private Sale The comparison...Ch. 9 - Trade-in Values vs Private Sale The comparison...Ch. 9 - Trade-in Values vs Private Sale The comparison...Ch. 9 - Circus Souvenir Use the information in the table...Ch. 9 - Prob. 30RPCh. 9 - Prob. 31RPCh. 9 - Bus Rides Use the information in the table to...Ch. 9 - Prob. 33RPCh. 9 - Find the median value. Student Enrollment The...Ch. 9 - Prob. 35RPCh. 9 - Find the median value. Pizza Delivery The numbers...Ch. 9 - Find the mean (average). Temperature Readings The...Ch. 9 - Find the mean (average). Groceries Purchased The...Ch. 9 - Find the mean (average). Textbooks Purchased The...Ch. 9 - Prob. 40RPCh. 9 - Find the mode. 22, 13, 18, 14, 13, 19Ch. 9 - Find the mode. 18, 14, 28, 18, 29, 18, 14Ch. 9 - Prob. 43RPCh. 9 - Prob. 44RPCh. 9 - Plot and label each point on the rectangular...Ch. 9 - Plot and label each point on the rectangular...Ch. 9 - Plot and label each point on the rectangular...Ch. 9 - Plot and label each point on the rectangular...Ch. 9 - Give the coordinates of each point. RCh. 9 - Give the coordinates of each point. SCh. 9 - Give the coordinates of each point. TCh. 9 - Give the coordinates of each point. UCh. 9 - Plot the points corresponding to the ordered pairs...Ch. 9 - Prob. 54RPCh. 9 - Prob. 55RPCh. 9 - List three ordered pairs that are solutions to the...Ch. 9 - Typing Speed The secretary for the JM law offices...Ch. 9 - Prob. 58RPCh. 9 - Fill in the ordered pairs so that they are...Ch. 9 - Graph each equation. y=3x1Ch. 9 - Graph each equation. y=5x4Ch. 9 - Graph each equation. y=4x6Ch. 9 - Graph each equation. y=1Ch. 9 - The ages of 5000 students on campus were recorded....Ch. 9 - The ages of 5000 students on campus were recorded....Ch. 9 - The ages of 5000 students on campus were recorded....Ch. 9 - Prob. 4TCh. 9 - The water in Toronto Harbor in Canada freezes...Ch. 9 - The water in Toronto Harbor in Canada freezes...Ch. 9 - Prob. 7TCh. 9 - Prob. 8TCh. 9 - The multiple bar graph indicates the number of...Ch. 9 - Prob. 10TCh. 9 - The multiple bar graph indicates the number of...Ch. 9 - The multiple bar graph indicates the number of...Ch. 9 - The multiple bar graph indicates the number of...Ch. 9 - Prob. 14TCh. 9 - A student received quiz grades of 89, 46, 85, 91,...Ch. 9 - Prob. 16TCh. 9 - Plot and label each ordered pair on the...Ch. 9 - Plot and label each ordered pair on the...Ch. 9 - Plot and label each ordered pair on the...Ch. 9 - Plot and label each ordered pair on the...Ch. 9 - Give the coordinates of each point. ACh. 9 - Give the coordinates of each point. BCh. 9 - Give the coordinates of each point. CCh. 9 - Prob. 24TCh. 9 - Plot the set of ordered pairs and then draw a line...Ch. 9 - Prob. 26TCh. 9 - Graph. y=4x2Ch. 9 - Graph. y=3x+1
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