Answer:
(a) (3, 6) and (7, 3)
Explanation:
You want the two points that best describe a line of best fit through the data shown on the given graph.
Line of best fit
A calculator finds the slope of the line of best fit to be about -0.74. The pair of points that best matches that is ...
(3, 6) and (7, 3) . . . . choice A
The line through these points has a slope of -0.75 and is very close to the best-fit line. The attachment shows how the various point pairs relate to the computed line. The answer choice points are the larger red dots.
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Additional comment
The slope of the line of best fit is the ratio of the covariance of x and y to the variance of x:
m = cov(x, y)/var(x) = -7.744/10.455 ≈ -0.741
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