If a Scattergraph Contains Points That Do Not Fall in a Perfect

If a scattergraph contains points that do not fall in a perfect line,

A) the relationship between the variables is not good enough to warrant fitting a line to the data.
B) this is an indication that there is no relationship whatsoever between the variables.
C) the visual fit method and high-low methods should not be used,but least-squares regression can be used.
D) a straight line can still be used to approximate the relationship if a general linear trend can be discerneD.The relationship need not be perfect to approximate a relationship.