Trend Lines
If a student has three or more data points entered on the graph, a black trend line will be shown. When a student is assigned to an intervention, or if their intervention changes during the year, a vertical black line will be displayed at the date the intervention began. If a student's intervention has changed, the previous black trend line will end, and a new trend line will be displayed once they have three more data points after the change line.
For details on working with interventions and trend lines. please click on the link to our easyCBM User's Manual and go to page 88.