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A study examined how the percentage of participants who completed a survey is related to the monetary incentive that researchers promised to participants. Consider the relationship between these two quantitative variables, displayed in the scatterplot below.

The direction of this relationship is Select an answer positive negative neither positive nor negative . In the context of this example, this means that when researchers promised higher payments, the percentage of participants who completed the survey Select an answer increased remains the same decreased . The form of the relationship is Select an answer linear curvelinear neither linear nor curveliner .  Based on the form of the relationship as it is illustrated above, the relationship is quite Select an answer strong weak .