Update visualization.py

visualization.py

@@ -55,6 +55,9 @@ class Visualization:
         ax.axhline(y=attendance_avg_stats, color='#005288', linestyle='--', linewidth=1.5, label=f'Attendance Average: {attendance_avg_stats}%')
         ax.axhline(y=engagement_avg_stats, color='#3AB0FF', linestyle='--', linewidth=1.5, label=f'Engagement Average: {engagement_avg_stats}%')
 
+        ax.axhline(y=attendance_avg_stats, color='#48BB88', linestyle='--', linewidth=1.5, label=f'Attendance Threshold: ≥ 90%')
+        ax.axhline(y=engagement_avg_stats, color='#235E44', linestyle='--', linewidth=1.5, label=f'Engagement Threshold: ≥ 80%')
+
         ax.set_xlabel('Student')
         ax.set_ylabel('Percentage (%)')
         ax.set_title('Student Attendance and Engagement Metrics')