Which set of ordered pairs represents a function?

A. {(1, 6), (3, 2), (4, 7), (3, 4)}


B. {(4, 1), (3, 2), (3, 3), (1, 4)}


C. {(1, 6), (2, 2), (4, 7), (3, 2)}


D. {(1, 2), (1, 3), (1, 4), (1, 5)}



The table shown represents a function.

x f(x)
1 6
2 7
3 8
4 9
5 10

Which equation represents the function shown in the table?

A. f(x)=x+5


B. f(x)=7


C. f(x)=6


D. f(x)=x+4