Understanding Functions: Domain and Range

What is the definition of a function?

• Has inputs and outputs

• Every input has only ONE output

• Inputs have different outputs every time

• x-values and y-values

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CCSS.8.F.A.1

All of the x-values or inputs are called what?

• Domain

• Range

• Relation

• Function

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CCSS.8.F.A.1

CCSS.HSF.IF.A.1

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

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CCSS.8.F.A.1

Is this graph a function or not a function?

• Function

• Not a Function

Is the relation shown a function?

• No, because the *x*-value 11 is paired with 5 and 8.

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

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CCSS.8.F.A.1

• 64

• -64

• -16

• 16

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CCSS.HSF.IF.A.2

• -2

• 2

• 4

• 0

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CCSS.HSF.IF.A.2

• 21

• -11

• -31

• 25

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CCSS.HSF.IF.A.2

Is this a function?

• Yes

• No

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CCSS.8.F.A.1

Determine if the set of ordered pairs is a function: {(1, 2), (2, 3), (3, 4), (1, 5)}

• No, it is not a function

• Yes, it is a function

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CCSS.8.F.A.1