If a scattergraph contains points that do not fall in a perfect line:
A. this is an indication that there is no relationship whatsoever between the variables.
B. the visual fit method and high-low methods should not be used, but least-squares regression can be used.
C. the relationship between the variables is not good enough to warrant fitting a line to the data.
D. a straight line can still be used to approximate the relationship if a general linear trend can be discerned.
Answer: D
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