Deer Valley Unified School District



End of Module 6 Study Guide – ANSWERS-The table shows the number of students who are interested in being members of the band. Find the percentage of girls who do not want to be members of the band. 10/65 ≈ 15%The table below shows numbers of rich and poor people in Alaska and Arizona. Find the percentage of rich people in Arizona.6667512921000326/801 ≈ 41%73342533591600The following table shows the results of a survey of people from New York and Houston. People were asked if they preferred Pepsi or Coca cola.847724149860Soda PreferenceCoca ColaPepsiTotalCityNew YorkHoustonTotal00Soda PreferenceCoca ColaPepsiTotalCityNew YorkHoustonTotalCalculate the relative frequencies for the table above. Write them as a percent. Round to the nearest tenth of a percent.What is the relative frequency for the Coca Cola category? Write a sentence interpreting this value in the context of soda preference.What is the relative frequency of people surveyed who are from Houston and prefer Pepsi? Write a sentence interpreting this value in context of soda preference.If a person was randomly selected from the participants in this survey and was from New York, what would you predict for the type of soda this person chose? Explain and support your answer!If a person was randomly selected from the participants in this survey, what would you predict this person’s soda preference to be? Explain and support your answer.New York: 19.6%, 9.8%, 29.4%Houston: 31.4%, 39.2%, 70.6%Total: 51%, 49%, 100%B.51% of the people surveyed prefer Coca ColaC. 39.2% of the people surveyed where people from Houston that preferred Pepsi.D.Coca Cola, because 2/3 of the people surveyed from New York prefer Coca Cola over PepsiE.Coca Cola, because over half of the people surveyed prefer Coca Cola5200651352550307218911834904. ?Create a scatter plot of the data on the graph below. ??? Draw a line of best fit for the graph ???? Write an equation in slope-intercept form to represent the line of best fit ?Identify and interpret the y-intercept. ?????Describe the relationship (positive/negative/none) between absences and math scores and interpret what that means.What math score would you expect a student to earn if he or she had 12 absences? ?Explain your reasoning.right1580000See chartSee chartSee chart≈95%, which is the predicted score for kids with 0 absencesNegative. As absences increase, scores decreaseBetween 0% and 10%2967487401535Which statement best describes the relationship between traffic volume and average vehicle speed on a certain freeway for 50 days in 1999.As traffic volume increases, vehicle speed increases.As traffic volume increases, vehicle speed decreases.As traffic volume increases, vehicle speed increases at first, then decreases.As traffic volume increases, vehicle speed decreases at first, then increases.00Which statement best describes the relationship between traffic volume and average vehicle speed on a certain freeway for 50 days in 1999.As traffic volume increases, vehicle speed increases.As traffic volume increases, vehicle speed decreases.As traffic volume increases, vehicle speed increases at first, then decreases.As traffic volume increases, vehicle speed decreases at first, then increases.1333546228005. The statement below shows the average traffic volume and average vehicle speed on a certain freeway for 50 days in 1999.b. as volume increases, vehicle speed decreases6. Sara is reading a book. Which of the following scatterplots most likely shows the relationship between the number of pages Sara has read so far and the number of pages she still has left to read?5013325983000322803526670001429080444500-2536952730500D7. The table shows the number of members at a gym each month from January to July.4552950552450005524500-101600136525Make a scatter plot of the data and draw a line of fit.Write an equation of the line of fit.Interpret the slope and the y-intercept of the line of fit.Using your equation, predict how many members the gym will have in December.0Make a scatter plot of the data and draw a line of fit.Write an equation of the line of fit.Interpret the slope and the y-intercept of the line of fit.Using your equation, predict how many members the gym will have in December.0000 See charty = 5.9x + 19slope is number of people increasing each month, y intercept is starting point in moth 0 (should be 0 people)Approximately 908. The table shows the numbers of losses y a gamer has x weeks after getting a new video game.372745014160500-1016002794000-247650126365Make a scatter plot of the data.Draw a line of fit.Write an equation of line of fit.Does the data show a positive, a negative,or no relationship?Interpret the relationship.00Make a scatter plot of the data.Draw a line of fit.Write an equation of line of fit.Does the data show a positive, a negative,or no relationship?Interpret the relationship.421173120357400 See chartSee chartSee chartNegative relationshipAs the number of weeks increases, the number of losses decreases2305050198120Graph B00Graph B-12700179070Graph A00Graph A9. Describe the relationship between the data. Identify any outliers or clusters.Negative (decreasing) relationshipPositive the negative (increasing then decreasing)Outlier at ≈ (24, 20)Cluster at ≈ (15, 37)34798002825750010. The scatter plot shows the numbers of hybrid vehicles sold in a city from 2009 to 2014.left139700In what year were 400 hybrid vehicles sold.About how many hybrid vehicles were sold in 2012?Describe the relationship shown by the data.00In what year were 400 hybrid vehicles sold.About how many hybrid vehicles were sold in 2012?Describe the relationship shown by the data.2013325Positive (Increasing). As the year increases the number of hybrids sold also increases29908504318000011. Identify the correlation displayed in the scatter plot. ?Circle your answer. Positive correlation relationshipNegative correlation relationshipNo correlation relationship??? positive correlation12. 9810751123950047529758255Scatter plot 3 shows negative relationship because as x is increasing, y is decreasing.00Scatter plot 3 shows negative relationship because as x is increasing, y is decreasing.13. The scatter plot below shows the results of a survey of eight-grade students who were asked to report the number of hours per week they spend playing video games and the typical number of hours they sleep each night.Mean Hours Sleep per Night Versus mean Hours Playing Video Games Per Week16256005143500 What trend do you observe in the data?What was the fewest numbers per week that students who were surveyed spent playing video games? What was the most numbers per week that students who were surveyed spent playing video games? What was the fewest number of hours per night that students who were surveyed typically slept?What was the most number of hours per night that students who were surveyed typically slept?Draw a line that seems to fit the trend data, and find the equation. Use the line to predict the number of hours of sleep for a student who spends about 15 hours a week playing video games.Negative (decreasing) correlation0 hours32 hours5 hours10 hoursCheck student work≈7A band will be paid a flat fee for playing a concert. Additionally, the band will receive a fixed amount for every ticket sold. If 40 tickets are sold, the band will be paid $200. If 70 tickets are sold, the band will be paid $260.Determine the rate of change.Let x represent the number of tickets sold and y represent the band will be paid in dollars. Construct a linear function to represent the relationship between the number of tickets sold and the amount the band will be paid.What flat fee will the band be paid for playing the concert regardless of the number of tickets sold?How much will the band receive for each ticket sold?2, b. y = 2x + 120, c. $120, d. $2 per ticket) Chris wants to add new music to his playlist. A music subscription site offers downloads using the following: Total Monthly Cost = 5.25 + 0.30(number of songs).Write a sentence (all words, no math symbols) that the subscription company could use on their website to explain how it determines the price for song downloads each month.Let x represent the number of songs downloaded and y represent the total monthly cost in dollars. Construct a function to model the relationship between the number of songs downloaded and the total monthly cost.Determine the cost of downloading 10 songs.Answers will vary - Ex. We charge $ a $5.25 monthly fee plus 30 cents per song downloaded, b. y = 5.25 + 0.30x, c. $8.25) ................
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