Function or Not a Function?

Front

What is a function?

Back

A function is a relation where each input (x-value) has exactly one output (y-value).

Tags

CCSS.8.F.A.1

Front

What does it mean if a relation is not a function?

Back

A relation is not a function if at least one input (x-value) is associated with more than one output (y-value).

Tags

CCSS.8.F.A.1

Front

How can you determine if a graph represents a function?

Back

You can use the vertical line test: if a vertical line intersects the graph at more than one point, it is not a function.

Front

What is the vertical line test?

Back

The vertical line test is a method to determine if a graph is a function by checking if any vertical line crosses the graph more than once.

Front

Give an example of a function.

Back

An example of a function is y = 2x + 3, where each x-value has a unique y-value.

Tags

CCSS.8.F.A.1

Front

Give an example of a relation that is not a function.

Back

An example of a relation that is not a function is y^2 = x, where each positive x-value corresponds to two y-values (positive and negative).

Front

What is the domain of a function?

Back

The domain of a function is the set of all possible input values (x-values) that the function can accept.

Front

What is the range of a function?

Back

The range of a function is the set of all possible output values (y-values) that the function can produce.

Front

What is a mapping diagram?

Back

A mapping diagram visually represents the relationship between the inputs and outputs of a function.

Front

What is a one-to-one function?

Back

A one-to-one function is a function where each output (y-value) is paired with exactly one input (x-value).