Identifying Functions

Front

Does this mapping diagram represent a function?

Back

Yes, because each input goes to one and only one output.

Front

What is the definition of a function?

Back

Every input has only one output.

Front

Is this a function or not a function?

Back

Function.

Front

r(-2) = ?

Back

r(-2) = -4.

Front

Which graph is NOT a function?

Back

Graph 1.

Front

What is a function?

Back

A relation where each input has exactly one output.

Front

Can a function have the same output for different inputs?

Back

Yes, a function can have the same output for different inputs.

Front

What is the vertical line test?

Back

A method to determine if a graph represents a function; if a vertical line crosses the graph more than once, it is not a function.

Front

What is the domain of a function?

Back

The set of all possible input values (x-values) for the function.

Front

What is the range of a function?

Back

The set of all possible output values (y-values) for the function.