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Pairs of readings are plotted as dots, one dot per pair, to see whether two quantities move together. What is this diagram called?
AA tally chart of the two quantities
BA scatter plot of the two quantities
CA pie chart of the two quantities
DA bar chart of the two quantities
Answer & Solution
Correct answer: B. A scatter plot of the two quantities
1. Each dot on the diagram stands for one pair of readings, one value on each axis.
2. A diagram of plotted points used to look for a relationship between two sets of data is a scatter plot.
3. A bar chart or pie chart shows the size of separate categories rather than paired readings.
4. So the diagram is a scatter plot, option B.
_Source: OpenStax College Algebra (CC BY 4.0), Ch 4 "Linear Functions", section 4.3 Fitting Linear Models to Data_
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