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Question 937085: Which of the linear equations BEST represents the line of best fit for the scatterplot?
A. y = 1/3x - 1
B. y = 1/3x + 1
C. y = 3x + 1
D. y = 3x - 1
http://www.usatestprep.com/modules/gallery/files/12/1228/1228.gif
Found 2 solutions by TimothyLamb, MathLover1:
Answer by TimothyLamb(4379)   (Show Source):
You can put this solution on YOUR website! D. y = 3x - 1
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Answer by MathLover1(20850)  (Show Source):
You can put this solution on YOUR website! at first look, we see that y-intercept is  ; so, options  and  are excluded
A.  ----could be this, or
B. 
C. 
D.  ----could be this
start with A. , take few more values for  , find  and see does it match a point on a graph
if  ,then ..this is a matching point
if  ,then ...this is not a matching point
if  ,then ...this is not a matching point
D.
if ,then ..this is a matching point
if ,then ..this is a matching point
if ,then ...this is a matching point
so, solution is D.
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