4. C. Linear Function
5. B. Rational Function
6. C. One-to-one correspondence is a function
7. C. Range
8. A. D: {-1, 0, 1, 2, 3}
9. B. Operations On Function
10. B. W(n) = 100n
11. A. the rule which assigns to each person the name of his brother (not sure po, sorry)
Hope it can help :)
