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4) The total car sales at Sandy’s Car Dealership had a steady increase from 1990 to 1999. Which model relates the number of cars sold in this time period as a

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4)  The total car sales at Sandy’s Car Dealership had a steady increase from 1990 to 1999. Which model relates the number of cars sold in this time period as a function of the number of years since 1990?









 


A)f(x) = 51.89x + 1137.5


B) f(x) = 58.9x + 1113.8






C)f(x) = 51.89x + 618.58





D)f(x) = 51.89x – 102125




 






 

 
5)  Corky’s Dairy has shown a steady increase in milk production over 10 years. Which model relates milk production as a function of the number of years since 2000? Using the model, what year will milk production exceed 3 million gallons of milk?









 


A)f(x) = 0.058x + 1.29; during the year 2010








B)f(x) = 0.58x + 1.03; during the year 2021








C)f(x) = 0.058x + 1.88; during the year 2020








D)f(x) = 0.055x + 1.21; during the year 2023




 






 

 
6)  The chart shows the age of a computer and its current value. Using a graphing calculator, determine the equation for the line of regression, the Pearson product-moment correlation value (r), and the value you predict for the computer when it is 9 years old.









 


A)y = -292x + 2421; r = -0.28; predicted value at age 9 equals -$207








B)y = -246x + 2221; r = -0.98; predicted value at age 9 equals $7








C)y = -292x + 2221; r = -0.98; predicted value at age 9 equals -$407








D)y = -292x + 2621; r = -0.98; predicted value at age 9 equals -$7




 






 


7) The chart shows the salaries for eight top workers and the years of experience for each worker. Using a graphing calculator, find the equation for the line of regression, the Pearson product-moment correlation value (r), and the predicted salary after 8 years of experience.




(Note: This table shows that several workers have the same number of years of experience.)









 


A)y = 2.9x + 13.7; r = 0.85; $ 36,900








B)y = 2.8x + 15.1; r = 0.92; $ 37,500








C)y = 3.1x + 10.9; r = 0.92; $ 35,700








D)y = 3.5x + 8.9; r = 0.85; $ 36,900




 

 






 
8)  Smallville’s town council has records of the town’s budget over a 10-year period. Create a best fit and model for the data. What does the model predict the town’s budget will be in the year 2011?









 


A)$404,000








B)$411,000








C)$391,000








D)$417,000




 






 Nov 5, 2014

1+0 Answers

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Can someone please answer these? I'd appreciate it immensely.

 Feb 22, 2019

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