Identifying Functions

Front

Does this table represent a function?

Back

No

Front

Does this mapping represent a function?

Back

Yes

Front

Does this mapping represent a function?

Back

No

Front

What is the definition of function?

Back

Every input has only ONE output

Front

Does this mapping represent a function?

Back

Yes

Front

What is a function?

Back

A relation where each input has exactly one output.

Front

What is an example of a function?

Back

f(x) = 2x + 3 is a function because each x has one corresponding y.

Front

What is a non-example of a function?

Back

y = ±√x is not a function because one x can have two y values.

Front

What is the vertical line test?

Back

If a vertical line intersects a graph more than once, it is not a function.

Front

What are inputs and outputs in a function?

Back

Inputs are the x-values, and outputs are the y-values.