Thank you Question 1: Two variables have a negative non-linear correlation.

174     134     155

y             60          80         72         69         44         59         51         63  

·        12.16x + 0.33

·        cannot be determined

·        12.16x – 0.33

·        0.33x + 12.16

Question 6: A data set whose original x values ranged from 41 through 78 was used to generate a regression equation of ŷ=5.3x – 21.9. Use the regression equation to predict the value of y when x=81.   

·        391.2

·        451.2

·        Meaningless result

·        318.7

Question 7: A data set whose original x values ranged from 120 through 351 was used to generate a regression equation of ŷ=0.06x + 14.2. Use the regression equation to predict the value of y when x=110.   

·        Meaningless result

·        20.80

·        21.34

·        -7.6

Question 8: A data set whose original x values ranged from 137 through 150 was used to general a regression equation of ŷ=-4.5x + 51. Use the regression equation to predict the value of y when x=141.   

·        -685.5

·        -583.5

·        Meaningless result

·        -574.5

Question 9: If the linear correlation coefficient is 0.681, what is the value of the coefficient of determination?

·        -0.464