Has inputs and outputs

Every input has only ONE output

Inputs have different outputs every time

x-values and y-values

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.

Function

Not a Function

Function

Not a Function

D: {-4, -2, 0, 2}

R: {-2, -2, 1, 1}

Function

D: {-4, -2, 0, 2}

R: {-2, 1}

Function

D: {-4, -2, 0, 2}

R: {-2, -2, 1, 1}

Not a Function

D: {-4, -2, 0, 2}

R: {-2, 1}

Not a Function