In order for applicants to work for the foreign-service department, they must take a test in the language of the country where they plan to work. the data below shows the relationship between the number of years that applicants have studied a particular language and the grades they received on the proficiency exam. find the standard of estimate, se, given thaty^= 6.91x + 46.26
numbers of years x 3 4 4 5 3 6 2 7 3

grades y 61 68 75 82 73 90 58 93 72

possible answers:

6.713

4.578

5.192

3.412