Identifying Functions (Additional Practice)

What is the vertical line test?

• A graph is not a function if you can draw a vertical line and it crosses the graph in more than 1 location

• A Graph is a function if it can be altered to make a linear equation.

• A graph is a function if you can create a vertical line that adheres to the equation y=mx+b

• Stay within the vertical lines

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CCSS.HSF.IF.A.1

CCSS.HSF.IF.C.7

Which of the following is a function?

• 
• 
• 
• 

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CCSS.8.F.A.1

Is the following graph a function?

• Yes, because the x never repeats.

• Yes, because they are individual dots.

• No, because the x repeats.

• No, because it is not a line.

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CCSS.HSF.IF.A.1

CCSS.HSF.IF.B.5

Which of the following is NOT a function?

• 
• 
• 
• 

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CCSS.8.F.A.1

• Function
• Not a Function

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CCSS.8.F.A.1

Which set of coordinates is NOT a function?

• (5,10) (2, -3) (8,12) (-4, 2)
• (5, 10) (2, 10) (3, 10) (-4, 10)
• (5, 10) (2, -3) (8, 12) (2, -4)
• (10, 5), (-3, 2) (12, 8) (2, -4)

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CCSS.8.F.A.1

Which set of ordered pairs 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)

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TEKS.MATH.8.5G

TEKS.MATH.A.12A

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

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CCSS.8.F.A.1

CCSS.HSF.IF.A.1

How do you determine if a relation is a function? 

• The vertical line test crosses more than one point on the graph.
• The same y-values are mapped from the same x-values.
• The vertical line test crosses only one point on the graph.
• Each input is related to more than one output.

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CCSS.HSF.IF.A.1

• Function
• Not a Function

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CCSS.HSF.IF.A.1

CCSS.HSF.IF.B.4

CCSS.HSF.IF.B.5