Vertical Line Test

Front

What is the Vertical Line Test?

Back

A method to determine if a graph represents a function. If any vertical line intersects the graph at more than one point, the graph does not represent a function.

Front

What does it mean for a relation to be a function?

Back

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

Tags

CCSS.8.F.A.1

Front

How can you tell if a graph is a function using the Vertical Line Test?

Back

If a vertical line drawn through any part of the graph intersects it at more than one point, then the graph is not a function.

Front

What is an example of a function?

Back

The equation y = 2x + 3 is a function because for every x-value, there is one corresponding y-value.

Tags

CCSS.8.F.A.1

Front

What is an example of a relation that is not a function?

Back

The equation x^2 + y^2 = 1 is not a function because a vertical line can intersect the circle at two points.

Front

What does it mean if a graph passes the Vertical Line Test?

Back

It means that the graph represents a function, as each x-value corresponds to only one y-value.

Front

Can a straight line be a function?

Back

Yes, a straight line can be a function if it is not vertical.

Front

What is the significance of the Horizontal Line Test?

Back

The Horizontal Line Test determines if a function is one-to-one, meaning each y-value corresponds to only one x-value.

Front

What is a non-function graph?

Back

A graph that fails the Vertical Line Test, meaning there are x-values that correspond to multiple y-values.

Front

What is the difference between a function and a relation?

Back

A function is a specific type of relation where each input has exactly one output.

Tags

CCSS.8.F.A.1