A social scientist would like to analyze the relationship between educational attainment (in years of higher education) and annual salary (in $1,000s). He collects data on 20 individuals. A portion of the data is as follows: 

Salary                                              Education 

40................................................................ 3 

53............................................................... 4 

⋮ ..................................................................⋮ 

38............................................................... 0

a. Find the sample regression equation for the model: Salary = β₀ + β₁ Education + ɛ. 

b. Interpret the coefficient for Education. 

c. What is the predicted salary for an individual who completed seven years of higher education?