Functions vs. Relations

Which set of values is a function?

• (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

Is it a function?

• It IS a function.

• It IS NOT a function

Does this mapping diagram represent a function?

• No, because an input value goes to multiple output values

• Yes, because each input goes to one and only one output

The second number in an ordered pair is...

• the larger number.

• the origin.

• the x-coordinate.

• the y-coordinate.

Functions have exactly one output for every input

• true

• false

Is this mapping a function or not a function?

• Function

• Not a Function

Which relation is NOT a function?

• {(1,-5), (3,1), (-5,4), (4,-2)}

• {(2,7), (3,7), (4,7), (5,8)}

• {(1,-5), (-1,6), (1,5), (6,-3)}

• {(3,-2), (5,-6), (7,7), (8,8)}

• Function
• Not a Function