Vertical Line Test Practice

A method to determine if a curve is a function by checking if any vertical line intersects the curve more than once.

The graph does not represent a function.

For every input x, there is exactly one output y.

No, if it does, the relation is not a function.

y = 2x + 3, because for every x, there is one unique y.

y^2 = x, because for some x values, there are two corresponding y values.

By using the Vertical Line Test; if any vertical line crosses the graph more than once, it is not a function.

A relation where each input is associated with exactly one output.

The output is determined solely by the input, ensuring a unique relationship.

Graphs that pass the Vertical Line Test.