Answer:
(b) perfect negative association
Step-by-step explanation:
You want the best description of the association between X and Y given that the points in the scatterplot lie on a line with negative slope.
Sign
The sign of the association matches the sign of the slope of the points on the graph. Here, the points have a negative slope: an increase in X means a decrease in Y.
Strength
When the scatterplot is a straight line, the association is "perfect". The correlation coefficient is exactly ±1. Here, the slope is negative, so the correlation coefficient is -1, a perfect negative correlation, choice B.
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Additional comment
The association is "moderate" if the points form a cloud around a line. If the points just form a cloud with no discernible slope, the association would be "weak" or "minimal" or "near zero."
