Identifying Functions Practice

Front

What is a function?

Back

A function is a relation between a set of inputs and a set of possible outputs where each input is related to exactly one output.

Tags

CCSS.8.F.A.1

Front

How can you identify a function from a graph?

Back

A graph represents a function if any vertical line drawn through the graph intersects it at most once (Vertical Line Test).

Front

What does it mean for a set of ordered pairs to represent Y as a function of X?

Back

Each input (X value) must correspond to exactly one output (Y value).

Tags

CCSS.8.F.A.1

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 an example of a set of ordered pairs that does NOT represent Y as a function of X?

Back

{(1, 2), (1, 3)} - Here, the input 1 corresponds to two different outputs.

Tags

CCSS.8.F.A.1

Front

What is the definition of a mapping in relation to functions?

Back

A mapping shows how each input is paired with an output; it can be used to determine if a relation is a function.

Tags

CCSS.8.F.A.1

Front

What does it mean if a mapping does NOT represent a function?

Back

It means at least one input is associated with more than one output.

Tags

CCSS.8.F.A.1

Front

What is an example of a function?

Back

{(1, 2), (2, 3), (3, 4)} - Each input has a unique output.

Tags

CCSS.8.F.A.1

Front

What is the significance of the input value in determining if a table represents Y as a function of X?

Back

If an input value appears more than once with different outputs, the table does not represent Y as a function of X.

Tags

CCSS.8.F.A.1

Front

What is a relation in mathematics?

Back

A relation is a set of ordered pairs, which may or may not be a function.

Tags

CCSS.8.F.A.1