Which Set of Ordered Pairs Is a Function? for Each

Multiple Choice

Which set of ordered pairs is a function? For each function, name the set of inputs (domain) and the set of outputs (range) . a. (7, 9) , (7, 11) , (7, 13)
b. (7, 9) , (9, 11) , (11, 13)

A) b is a function. Domain is {7, 9, 11}, range is {9, 11, 13}.
B) a is a function. Domain is {7}, range is {9, 11, 13}.
C) a is a function. Domain is {7}, range is {9, 11, 13}.
B is a function. Domain is {7, 9, 11}, range is {9, 11, 13}.
D) b is a function. Domain is {7}, range is {9, 11, 13}.
A is a function. Domain is {7, 9, 11}, range is {9, 11, 13}.
E) a and b are not functions.