# CCSS IP Math I 4.3.3 Example 2

Mr. Gray’s students are interested in learning how studying can improve test performance. Mr. Gray provides students with practice problems related to particular tests. The class records the number of practice problems completed and the score on that related test in the table below.
What is the correlation between the number of practice problems completed and the test score?
Is there a causal relationship between the number of practice problems completed and the test score?