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Question 480715: Rewrite the vertical line test as two if-then statements.
Answer by richard1234(7193)   (Show Source):
You can put this solution on YOUR website! You could say,
"If any vertical line crosses the graph of a relation at at most one point, the relation is a function."
"If some vertical line crosses the graph of a relation at two or more points, the relation is not a function." (this statement is necessary since it is not logically equivalent to the first statement)
Alternatively, you can condense into one if-then statement:
"Iff any vertical line crosses the graph of a relation at at most one point, the relation is a function." (Iff means "if and only if").
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