Function or Not

What is the definition of function?

• Has inputs and outputs

• Every input has only ONE output

• Inputs have different outputs every time

• x-values and y-values

Answer explanation

Every x-value has only one y-value.

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1

Which ordered pair below would prevent this table from being a function?

• (10, 10)

• (2, 4)

• (6, 1)

• (-2, 0)

Answer explanation

Input/x-value of -2 can't repeat with a different output/y-value.

Tags

CCSS.8.F.A.1

Which graph does NOT pass the vertical line test?

• Graph 1
• Graph 2
• Graph 3
• Graph 4

Tags

CCSS.HSF.IF.B.4

CCSS.HSF.IF.C.7

• Function

• Not a function

Answer explanation

Every input/x-value has only one output/y-value.

• Function

• Not a function

Answer explanation

Input of 1 has two different outputs. And input of 4 has two different outputs.

Tags

CCSS.8.F.A.1

Is this graph a function or not a function? 

• Function 

• Not a Function

Answer explanation

Every input/x-value has only one output/y-value. We can tell because it passes the vertical line test.

• Function

• Not a function

Answer explanation

Every input/x-value has only one output/y-value.

Tags

CCSS.8.F.A.1

Is this mapping a function or not a function? 

• Function

• Not a Function

Answer explanation

Input of 6 has two different outputs.

Tags

CCSS.8.F.A.1

Is the graph pictured a function?

• Yes

• No

Answer explanation

Multiple inputs have two outputs. Does NOT pass the vertical line test!

• Function

• Not a Function

Answer explanation

Input of -2 has two different outputs.

Tags

CCSS.8.F.A.1