Scatter plot and correlation

Given scatter plots: determine correlation among variables.

Answer the following questions about the relationships between pairs of variables and the values of r, the sample correlation coefficient. The same response may be correct anser for more than one question.
1. For which data set is the sample correlation coefficient r closest to -1?
2. For which data set is the sample correlation coefficient r equal to 1?
3. For which data set is the sample correlation coefficient r closest to 0?
4. Which data set indicates the strongest positive linear relationship between its two variables?

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Solution Summary

The solution determines the sample correlation relationships based on scatter plots.