Do you have Excel?. It'll do this lickety-split.
you are given the following data:
number of absences final grade
0 96
1 91
2 78
2 83
3 75
3 62
4 70
5 68
6 56
a)make a scatter plot for the data
b)find the correlation coefficient for the data
c)find the equation for the regression line for the data, and predict the final grade of a student who misses 3.5 days