The Relationship between Two Quantitative Variables — Quiz

Question 1 • 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 are scattered throughout the graph.

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 increase tightly together.

Explanation

A stronger relationship is shown when the points lie close to a clear pattern. In choice D, the points increase together and are tightly clustered, indicating a strong positive relationship. Choice C also shows a positive relationship, but its points are more loosely scattered.

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