The data below are the number of absences and the final grades of 9 randomly selected students in class.

Number of absences, x

0

3

6

4

9

2

15

8

5

Final grade, y

98

86

80

82

71

92

55

76

82

a. Make a scatterplot on your calculator. Describe the relationship between absences and final grades?

b. Find the least squares regression line. Include it below. Round all constants to 4 decimal places.

c. Use your equation to predict the final grade of a student with one absence.

d. Find the correlation coefficient, rounded to 3 decimal places. What does this tell you about the relationship between the two variables?