Alfonso surveyed several students in his school. He asked them to give the grade that they are in and the number of pets they have at home. The results are shown in the table below.
Survey Results
Grade
Number of
Pets
5
0
6
4
2
2
1
3
4
5
2
1
4
2
1
2
4
0
3
5
5
2



Find the correlation coefficient for the data. Round to the nearest hundredth.