SOLUTION: 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

SOLUTION: 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.usates

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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