Determine whether each relation is a function. Explain why or why not. 1. {(3,2), (-1, 3), (5, 2)} 2. {(9,-1), (3, 6), (-2, 4), (3,0)} Determine if each equation defines y as a function of x. Explain why or why not. 3. x+2y=6 4. x-7y=3 5. x + y = 10 Determine the domain of each of the following. 6. f(x)=4x+4 7. f(x)= x-3 x-16 8. f(x)=3x-6 Evaluate the following given f(x)=4x+3 and g(x) = x+4x-1. Determine the domain of each. 9. f(4) 10. g(2) 11. f(x+3) 12. g(x+2)