The following data give the starting salary for students who recently graduated from a local university and accepted jobs soon after graduation. The starting salary, grade-point average (GPA), and major (business or other) are provided.

SALARY	$29,500	$46,000	$39,800	$36,500
GPA	3.1	3.5	3.8	2.9
Major	Other	Business	Business	Other
SALARY	$42,000	$31,500	$36,200
GPA	3.4	2.1	2.5
Major	Business	Other	Business

1. Using a computer, develop a regression model that could be used to predict starting salary based on GPA and major.
2. Use this model to predict the starting salary for a business major with a GPA of 3.0.
3. What does the model say about the starting salary for a business major compared to a nonbusiness major?
4. Do you believe this model is useful in predicting the starting salary? Justify your answer, using information provided in the computer output.

PLEASE SHOW EXCEL CALCULATIONS