Which set of ordered pairs is a function? For each function, name the set of inputs (domain) and the set of outputs (range). a. (9, 99), (9, 999), (9, 9999)
b. (-4, 8), (-5, 8), (-6, 8)
A) a is a function. Domain is {9}, range is {99, 999, 9999}.
B) b is a function. Domain is {-4, -5, -6}, range is {8}.
C) a is a function. Domain is {9}, range is {99, 999, 9999}.
B is a function. Domain is {-4, -5, -6}, range is {8}.
D) b is a function. Domain is {9}, range is {99, 999, 9999}.
A is a function. Domain is {-4, -5, -6}, range is {8}.
E) a and b are not functions.

Question

Quizplus · Accepted Answer

Option a is not a function because it assigns multiple outputs (99, 999, 9999) to the same input (9). Option b is a function because each input (-4, -5, -6) has exactly one output (8).

Which Set of Ordered Pairs Is a Function? for Each