Function vs Non-Function

Which of the following is a function?

• A

• B

• C

• D

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)}

Which graph does NOT pass the vertical line test?

• Graph 1

• Graph 2

• Graph 3

• Graph 4

When deciding whether a relation represents a function.....

• x and y values cannot repeat

• x values cannot repeat

• y values cannot repeat

• x and y values can repeat

Which of the following represents a function?

• <(1,2), (1,3), (1,4), (1,5)>

• <(1,2), (2,3), (3,4), (4,5)>

• <(1,2), (3,4), (3,5), (6,7)>

• <(1,2), (3,4), (5,6), (5,8)>

Which value of w would allow these coordinates to represent a function?

• -3

• -5

• 6

• 0

How do you determine if a graph is a function?

• look at the y-values, if they repeat, it's not a function

• Use the "vertical line" test aka "pencil test"

• Look at you x-values, if they repeat it is a function

• Use the horizontal line test

Is this graph a function or not a function? 

• Function

• Not a Function

Is this graph a function or not a function? 

• Function 

• Not a Function 

Is this graph a function or not a function? 

• Function 

• Not a Function