How do you determine whether two interval variables have a positive linear relationship?
A. Most of the points fall close to a straight line with positive slope.
B. As the X variable increases, the Y variable increases in a linear way.
C. The scatter diagram shows a linear pattern that is going uphill.
D. All of these choices are true.
Analysis:
A. Incorrect. Most of the points fall close to a straight line with positive slope.
B. Incorrect. As the X variable increases, the Y variable increases in a linear way.
C. Incorrect. The scatter diagram shows a linear pattern that is going uphill.
D. Correct. All of these choices are true.
ANSWER : D
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