Sample Response: The vertical line test is a way to
determine if a relation is a function. This test
determines if one input has exactly one output on the
graph. If any vertical line passes through more than
one point on the graph, then the relation is not a
function because two different outputs have the same
input.
Which did you include in your response?
The relation is a function if there is only one point of
intersection for any vertical line on the graph.
The relation is not a function if any vertical line has
more than one point of intersection on the graph.
The vertical line test is used to determine if one
input has exactly one output.