The Relationship between Two Quantitative Variables — Quiz

Question 4 • Statistical Reasoning

Which scatterplot demonstrates the strongest relationship between two quantitative variables?

Answer

Image with description A scatter plot has x on the x-axis, and y on the y-axis. Points curve up and then down in a line.

Image with description A scatter plot has x on the x-axis, and y on the y-axis. Points increase loosely together.

Image with description A scatter plot has x on the x-axis, and y on the y-axis. Points decrease loosely together.

Image with description A scatter plot has x on the x-axis, and y on the y-axis. Points are scattered throughout the graph.

Explanation

The strongest relationship is the one where the points follow the clearest pattern, even if that pattern is curved rather than a straight line. In A, the points closely trace a curve that rises and then falls. B and C show loose linear trends, while D has no clear pattern.

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