From the data given below if we made a scatter chart what would you forecast a student's test grade to be if she attended 100% of classes?

Student ID	Class Attendance (%)	Grade (out of 100)
#001	80	72.5
#002	90	52.5
#003	50	70
#004	70	75
#005	80	57.5
#006	80	82.5
#007	60	70
#008	90	72.5
#009	80	77.5
#010	70	62
#011	50	42.5
#012	60	62.5
#013	80	67.5
#014	80	95
#015	70	52.5
#016	70	52.5
#017	60	65
#018	50	55
#019	90	80
#020	80	72.5
#021	60	70