A. Use the domain and range of each of the following relations to determine which is a function.
{3, 7, - 7,9}
b. {(3,9), (7. - 4), (-7,7)}
• {(3,9), (7. - 4), (37)
d. {(3,9), (7. - 4), (7,6), (-7, 7)}
Please select the best answer from the choices provided

Option B.

Step-by-step explanation:

A relation is called a function if there exist unique value of y for each value of x.

In option (a), is set not a relation.

In option (b), is function because there exist unique value of y for each value of x.

In option (c), is not function because there exist two value of y, which are 9 and 7, for x=3.

In option (d), is not function because there exist two value of y, which are -4 and 6, for x=7.

Therefore, the correct option is B.

mxb67

step-by-step explanation: