Difference between revisions of "Vertical line test"
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| − | The '''vertical line test''' is a way of determining if a plotted [[graph]] is a [[function]]. | + | The '''vertical line test''' is a way of determining if a plotted [[graph of a function | graph]] is a [[function]]. |
The vertical line test states that: | The vertical line test states that: | ||
Revision as of 10:06, 15 October 2006
The vertical line test is a way of determining if a plotted graph is a function.
The vertical line test states that:
A relation is a function iff no vertical line intersects the graph in more than one point.
This is because a function cannot have more than one output for one input.
For example, 
is a function because any vertical line intersects it in, at most, one point, while 
is not a function (try the line 
).
