A scatter plot displays paired numerical data to investigate the association (positive, negative, or none) between two variables.
Grade 8Common Core 8.SP.A.1SPVerified correct ✓
Worked examples
A scatter plot shows the relationship between the number of hours of TV watched per day (x) and the score on a math test (y) for 7 students. The points are spread out with a general trend going from upper-left to lower-right, but with several points far from the trend. (a) Describe the association between TV hours and test score (positive, negative, or no association). (b) Would you describe the association as strong or weak? Explain using the scatter plot description. (c) Identify one point that appears to be an outlier and describe how it differs from the overall pattern.
Answer:
A scatter plot shows the relationship between the number of hours of TV watched per day (x) and the score on a math test (y) for 87 students. The points are spread out with a general trend going from upper-left to lower-right, but with several points far from the trend. (a) Describe the association between TV hours and test score (positive, negative, or no association). (b) Would you describe the association as strong or weak? Explain using the scatter plot description. (c) Identify one point that appears to be an outlier and describe how it differs from the overall pattern.
Answer:
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