+509 A teacher wants to know how much she can predict a student's reading level from their grade level in a given school district. The table shows the grade and reading levels of eight students.
Grade Level 5.1 7.2 6.3 8.5 7.7 9.3 5.0 6.4
Reading Level 4.8 5.5 6.1 7.9 6.2 7.9 4.3 6.1
What percent of variation in the reading level can be explained by changes in the grade level?
78.5%
85.1%
88.7%
92.2%
