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The table below shows the number of words a student typed during five timed sessions. Which equation best models a line of best fit for these data?
w = 3m + 60 w = 102m − 117 w = 60m + 3 w = −117m + 102 Based on the results of the simulation, what is the total number of people out of 150 who would need to buy less than 10 boxes of cereal to get all 5 prizes? A box of cereal contains 1 of 5 different prizes. A simulation was conducted to predict how many boxes of cereal must be bought in order to get all 5 prizes. The results of 30 trials are shown in the stem-and-leaf plot on the next slide.
15 3 5 30 The population for the years 1996 to 2005 of a small town is shown on the graph on the next slide. It is valid because the scaling on both axes is appropriate. It is valid because the scaling on the vertical axis is appropriate. It is not valid because the scaling on both axes is inappropriate. It is not valid because the scaling on the horizontal axis is inappropriate. Based on the graph, the mayor states that the population of the town increased at a steady rate for the years 1996 to 2005. Which of the following statements is true about the mayor’s conclusion? The median misrepresents these test scores because 100 is an extreme value. The mean represents these test scores because it is the middle value of these test scores. The median represents these test scores because it is the value that occurs the most. The mean misrepresents these test scores because 100 is an extreme value. The test scores for the nine students in Mrs. Miller’s history class are shown below. 68 69 70 71 71 72 72 72 100 Which of the following statements is true about the test scores? The table shows the cost of health care, in millions of dollars, from 1996 to 2001. The equation of a line of best fit for this data is y = 30x + 474, where x represents the number of years since 1996 and y represents the cost of health care, in millions of dollars. Which statement best describes the meaning of the slope of this equation? The cost of health care increased by $474,000,000 per year since 1996. The cost of health care increased by $30 per year since 1996. The cost of health care increased by $30,000,000 per year since 1996. The cost of health care increased by $474 per year since 1996. The owner of a store wants to decide when to close the store after 4 p.m. The table below shows the median profit of the store for five time intervals during a six-month period. Based on the data in the table, at which of these times should the owner close the store to maximize profit? 6:00 p.m. 5:00 p.m. 7:00 p.m. 9:00 p.m. Minh used the graph on the next slide to show that the average cost of a school lunch is increasing at a rapid rate. Which of these best describes why this is a misuse of statistics? The years should be placed on the horizontal axis to show how the average cost of a school lunch changes over time. The cost of a school lunch is actually decreasing. A line of best fit should be used instead of a line graph. The graph should not include the years where the cost stayed the same. A teacher collects data to show the relationship between the number of student absences (x) and the grade a student earns (y). Using the data, the teacher determines the equation for the line of best fit, as shown below. y = −0.25x + 4 The teacher then uses the equation to predict the letter grade that a student earns. This relationship is shown on the next slide. What is the letter grade for a student that has 4 absences? A B C D A school has 750 students. A randomly selected sample of 100 students was asked to name their favorite class. The results are shown in the table on the next slide.
Based on the survey results, what is the total number of students at the school who will choose science as their favorite class? 12 16 75 90 Based on the survey results, what is the total number of students at the school who will choose science as their favorite class? The cafeteria manager is going to start selling cookies at lunch. She surveyed 300 randomly selected students on their cookie preferences. The survey results are shown in the table on the next slide. She needs cookies for 1,640 students. Based on the survey results, if each student buys one cookie, what is the total number of vanilla creme cookies she should buy? Round the answer to the nearest whole number. She needs cookies for 1,640 students. Based on the survey results, if each student buys one cookie, what is the total number of vanilla creme cookies she should buy? Round the answer to the nearest whole number. 67 12 366 734 |