Function Quiz Review

If the first coordinate represents the input value and the second coordinate represents the output value, which two points could NOT be on the graph of the same function?

(input, output)

• (3, 7)

• (4, 8)

• (4, -3)

• (5, 9)

• (9, 8)

Which ordered pair (x, y) can be added to the table so that y is still a function of x?

• (-5, 10)

• (-9, -8)

• (-8, 0)

• (17, 3)

Which relation is a function?

• {(7, 8)(5, 0)(−3, 1)(−5, 0)(−3, 2)}

• {(-7, 8)(5, 0)(−7, 1)(−5, 0)(−3, 2)}

• {(7, 8)(-5, 0)(−3, 1)(−5, 0)(10, 2)}

• {(0, 8)(2, 0)(−4, 1)(−5, 0)(−3, 2)}

Do the ordered pairs represent a function or relation?

(7, 3), (4, 2), (-8, 3), (-8, -2), (-1, 2)

• It's a FUNCTION because for every x-value there is only one y-value

• It's a FUNCTION because for every y-value there is only one x-value.

• It's a RELATION because there is more than one x-value for the same y-value.

• It's a RELATION because there is more than one y-value for the same x-value.

Is this table a function or relation? Explain.

• It's a FUNCTION because for every x-value there is only one y-value.

• It's a FUNCTION because for every y-value there is only one x-value.

• It's a RELATION because there are two y-values for the same x-value.

• It's a RELATION because there are two x-values for the same y-value.

Is this mapping diagram a function or relation? Explain.

• It's a FUNCTION because for every x-value there is only one y-value.

• It's a FUNCTION because for every y-value there is only one x-value.

• It's a RELATION because there are TWO y-values for the same x-value.

• It's a RELATION because there are TWO x-values for the same y-value.

Is this graph a function or relation?

• Function

• Relation

• Neither

• Both

Is this graph a function or relation?

• Function

• Relation

• Neither

• Both