Homework Answers
--14
Student-Id->Grade is valid functional dependency. Because Grade of students can be identified unique by Student-Id. Id is unique for each student.
Instructor -Id -> Class - Code is not functional dependencies because both are unique and can be identified without any on of entity.
Instructor-Lastname->Instructor-id is not functional dependencies because last name can be repetitive and cannt identify instrutoin id with help of LastName
--15
False (Multivalued parameters will be removed in 1NF. A well designed database will be in 3NF or 2NF)
--16
Yes (Foreign key is repetitive. It is primary key of some other table. For example- Class -id is unique key of class table. In students table it will be repetitive because same class can be tagged to multiple students)
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