Decide whether or not each table or graph below could represent a function. If not, circle what tells you it’s not a function. In a function, there is exactly one y-value for each x-value. If a table or graph has more than one y-value for the same x-value, it can not represent a function.

x y

-2

5

0

2

2

4

4

7

6

8

diagonal line sloping upward
x y

0

7

1

2

1

3

2

6

3

-8

Function or Not a Function?

Function or Not a Function?

Function or Not a Function?

graph of a curve that comes in to the origin from the top right and exits as a line toward the bottom right
x y

-1.5

-2

-1

-1

-0.5

0

0

1

0.5

2

scatter plot

Function or Not a Function?

Function or Not a Function?

Function or Not a Function?
x y

-1

1.5

0

1.5

1

1.5

2

1.5

3

1.5

graph of an S-shaped curve, opening up and down
x y

8

1

5

2

4

3

5

4

8

5

Function or Not a Function?

Function or Not a Function?

Function or Not a Function?

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