Question

A teacher wants to know how much she can predict a student’s reading level from their grade level in given school district. The table shows the grade and reading levels of eight students

Answer 1

i think the awnser to this question is c am i right?

Answer 2

Answer:

Step-by-step explanation:

x y xy x^2 y^2

     

7.1 7.1 50.41 50.41 50.41

6.2 6.2 38.44 38.44 38.44

10.3 10.3 106.09 106.09 106.09

4.5 4.5 20.25 20.25 20.25

9.7 9.7 94.09 94.09 94.09

8.3 8.3 68.89 68.89 68.89

7 7 49 49 49

6.4 5.5 35.2 40.96 30.25

Mean 7.4375 7.325 57.79625 58.51625 57.1775

     

Cov 3.3165625 r #DIV/0!  

r 0.987954244    

r^2 0.976053588  

The coefficient of determination r square is 97.60%

Hence 97.6% variation is explained by changes in grade level

Nearest answer is option b