Which of the following statements about correlation is true?
a. -we say there is a positive correlation between x and y if there is no distinct pattern in the scatterplot
b. -we say that there is a positive correlation between x and y if the x-values increase as the corresponding y-values increase
c. -we say that there is a positive correlation between x and y if the x-vales increase as the corresponding y-values decrease
d. -we say that there is a negative correlation between x and y if the x-values increase as the corresponding y-values increase
Ans: b. -we say that there is a positive correlation between x and y if the x-values increase as the corresponding y-values increase
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A. 
B. 
C. 
D. 
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A. 
B. -64
C. 
D. 64