Use the advertised prices for used cars of a particular model in the accompanying table to create a linear model for the relationship between a car's Age and its Price. Complete parts a through g. a) Find the equation of the line of regression. Price = Age (Round to the nearest integer as needed.) b) Explain the meaning of the slope of the line. Select the correct choice below and fill in the answer box to complete your choice. (Round to the nearest integer as needed.) O A. The slope indicates that every $1 increase in Price increases the Age of cars of this model by year(s), on average. - X Data table O B. The slope indicates that every 1-year increase in Age increases the Price of cars of this model by $, on average. O C. The slope indicates that every $1 icrease in Price decreases the Age of cars of this model by year(s), on average. Age (yr) Price Advertised (S) O 17,588 14,969 15,959 13,958 14,999 14,589 13,988 11,998 9,968 11,538 10,878 10,898 10,019 O D. The slope indicates that every 1-year increase in Age decreases the Price of cars of this model by $, on average. 2 3. c) Explain the meaning of the y-intercept of the line. Select the correct choice below and fill in the answer box to complete your choice. (Round to the nearest integer as needed.) 4. 4. O A. The y-intercept indicates that every 1-year increase in Age decreases the Price of cars of this model by $. on average. 7. O B. The y-intercept means that a new car of this model costs $. on average. OC. The y-intercept means that a car of this model that costs $0 is year(s) old, on average. 8. 8. O D. The y-intercept indicates that every $1 increase in Price decreases the Age of cars of this model by year(s), on average. 12

Arman is saving his money. On day 3 he has $110. On day 5 he has $150. What would be equation of a linear model for his saving. Assuming y represent his saving in $ and x is number of days .

Tell whether a linear model or a quadratic model is appropriate for the data. If linear, tell whether the slope should be positive or negative. If quadratic, decide whether the leading coefficient of x should be positive or negative. O A. linear, negative O B. quadratic; negative O C. quadratic; positive O D. linear; positive 3- 2- -5 43 2 2. 3 4 5 20 -4-

Let x be the average number of employees in a group health insurance plan, and let y be the average administrative cost as a percentage of claims. x 3 7 15 33 72 y 40 35 30 26 17 (a) Make a scatter diagram of the data and visualize the line you think best fits the data. A scatter diagram has a horizontal axis labeled "x (average number of employees)" with values from 3 to 72 and a vertical axis labeled "y (average cost as percentage)" with values from 17 to 40. The scatter diagram has 5 points. A pattern goes up and right from (13, 17) to (72, 40).     A scatter diagram has a horizontal axis labeled "x (average number of employees)" with values from 3 to 72 and a vertical axis labeled "y (average cost as percentage)" with values from 17 to 40. The scatter diagram has 5 points. A pattern goes down and right from (3, 40) to (72, 17).   A scatter diagram has a horizontal axis labeled "x (average number of employees)" with values from 3 to 72 and a vertical axis labeled…