Answer:
D. More than half the students scored between 70 and 80 on both exams.
Explanation:
If we look at choice A:
A. No students scored above 90 on both exams.
This is not true since the graph shows there were students who scored above 90 points on both exams.
If we look at choice B:
B. One student scored exactly 60 on both exams.
This is true but insufficient data since we also have a student who scored 80 points in both exams.
If we look at choice C:
C. All the students scored between 60 and 100 on both exams.
This is not true since some students scored below 60 points in Math Exam.
If we look at choice D:
D. More than half the students scored between 70 and 80 on both exams.
This is absolutely true since more than half of the total number of dots are concentrated within scores 70 and 80 in both exams.