Yes, because the x-value 11 has two y-values pair with it.

Yes, because each x-value has only one y-value paired with it.

No, because the x-value 11 has two y-values pair with it.

No, because each x-value has only one y-value paired with it.

(9,5) (10,5) (9,-5) (10,-5)

(3,4) (4,-3) (7,4) (3, 8)

(6,-5) (7, -3) (8, -1) (9, 1)

(2, -2) (5, 9) (5, -7) (1, 4)

Function

Not a Function

Function

Not a Function

D: {1, -3, -4,}
R: {0, 1, 2, -4}

D:{-4, 0, 1, 2}
R:{-4, -3, 1}

D:{0, 1, 2, 3, 4}
R:{1, -3, -4}