What is depicted on a graph as a series of straight lines connecting data points within a phase?

The correct answer is that what is depicted on a graph as a series of straight lines connecting data points within a phase is referred to as a data path. This representation effectively shows the progression or changes in behaviors or measurements over time within a specific phase of a graph.

In applied behavior analysis (ABA), a data path visualizes individual data points collected during an intervention phase, indicating how the target behavior has progressed. By connecting these points with straight lines, it displays trends and patterns that may emerge throughout a specific time frame, allowing practitioners to easily assess the effectiveness of their interventions.

This method of representation is fundamental in understanding the dynamics of behavior change and assists practitioners in making data-informed decisions. The data path serves not only as a visual representation but also as a tool for analysis within the broader context of behavior change strategies.