To identify which pair of variables would be represented by a scatterplot with a positive correlation, we need to look for a relationship where as one variable increases, the other variable also increases.
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A person's height and the person's grade on the math test: There is no clear positive correlation here; height does not directly influence math grades.
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The depth of the water in a pond and the amount of rainfall: This pair is likely to have a positive correlation; more rainfall generally leads to a greater depth of water in a pond.
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The number of miles driven and the number of people on the bus: This pair usually does not have a positive correlation; as the number of miles driven increases, it doesn’t necessarily mean more people are on the bus (in fact, it could mean the opposite if there are fewer passengers).
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The number of concert tickets purchased and the number of concert tickets still available for purchase: This pair will have a negative correlation; as more tickets are purchased, fewer tickets will be available.
Based on this analysis, the pair "the depth of the water in a pond and the amount of rainfall" is the one that would likely represent a scatterplot with a positive correlation.
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