Registered Behavior Technician (RBT) Practice Exam 2026 – All-in-One Comprehensive Guide for Exam Success!

The X-axis represents the measure of time in a graph. This is because it shows the progression of time, which allows for visualizing changes and patterns over time. Option A is incorrect because the X-axis is not always a dependent measure, it can also represent an independent variable such as time in this case. Option C is incorrect because the baseline conditions are typically represented by a horizontal line intersecting the Y-axis at a specific value, rather than the X-axis. Option D is incorrect because the phase change is typically represented by a vertical line on the graph, indicating a change in a variable at a specific point in time, rather than the overall progression of time.