Question

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

Answer 1

Answer: B.{(3,9), (7. - 4), (-7,7)}

Step-by-step explanation: got it right on edge

Answer 2

Option B.

Explanation:

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

In option (a),
`\{3,7,-7,9\}` is set not a relation.

In option (b),
`\{(3,9),(7,-4),(-7,7)\}` is function because there exist unique value of y for each value of x.

In option (c),
`\{(3,9),(7,-4),(3,7)\}` is not function because there exist two value of y, which are 9 and 7, for x=3.

In option (d),
`\{(3,9),(7,-4),(7,6),(-7,7)\}` is not function because there exist two value of y, which are -4 and 6, for x=7.

Therefore, the correct option is B.