The scatter plot shows the relationship between the number of homework assignments turned in over a week and the test score for that same week: A scatter plot is shown. The x-axis is labeled Homework Assignments Submitted and the y-axis is labeled test score. Data points are located at 1 and 30, 2 and 70, 2 and 75, 3 and 80, 5 and 100, 4 and 100, 4 and 90, 5 and 95, and 1 and 60. A circle labeled X surrounds all of the points except 1 and 30. The point 1 and 30 is labeled Y.
Part A: What is the group of points labeled X called? What is the point labeled Y called? Give a possible reason for the presence of point Y. (3 points)
Part B: Describe the association between a student's test scores and the number of homework assignments submitted. (2 points)