Determine If Its a Function

Is this table a function or not a function?

• Function

• Not a Function

Answer explanation

Every input has exactly one output.

Which set of values 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)

Answer explanation

Every input within this set of ordered pairs has exactly one output. This is NOT the case for any other options.

Does this set of values represent a function?

• yes, it is a function

• no, it is not a function

Answer explanation

Every input has exactly one output.

Does this set of values represent a function?

• Yes, it is a Function

• No, it is not a Function

Answer explanation

Every input has exactly one output.

Is this graph a function or not a function?

• Function

• Not a Function

Answer explanation

It fails the "vertical line test", which means at least one input has more than one output.

Is this mapping a function or not a function?

• Function

• Not a Function

Answer explanation

Every input (left grouping) maps to exactly one output (right grouping).

Is this mapping a function or not a function? Why?

• Yes, because the x-value 11 has two y-values pair with it.

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

• No, because the x-value 11 has two y-values pair with it.

• No, because each x-value has only one y-value paired with it.

Answer explanation

The input of 11 has more than one output.

What is the most accurate definition of function?

• Has inputs and outputs

• Every input has exactly one output

• Inputs have different outputs every time

• x-values and y-values

Is this table a function or not a function?

• Function

• Not a Function

Answer explanation

The input of 3 has more than one output (1 and 6)

Which graph does NOT pass the vertical line test?

• Graph 1

• Graph 2

• Graph 3

• Graph 4

Answer explanation

If a graph passes the "vertical line test", it means every input (x-value) has no more than one output (y-value) associated with it!

If a graph fails the "vertical line test", it means that at least one input (x-value) has more than one output (y-value) associated with it. Not every input has exactly one output.