Mr. Thomas wanted to know if the amount of class time that he gave students to study affected
their test scores. The scatter plot below shows the
results,
STUDY TIME VS.
AVERAGE TEST SCORES
90
85
80
Average Test Score
75
:
70
0 5 10 15 20 25 30
Study Time
What kind of relationship between class study time
and test scores is shown on the scatter plot?
A. no correlation
B. positive correlation
C. negative correlation
D. positive then negative correlation