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Which relations are functions? Select function or not a function for each graph
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Which relations are functions? Select function or not a function for each graph

Which relations are functions? Select function or not a function for each graph-example-1
User Heigo
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This is NOT a function. The reason why is because we are able to pass a single vertical line through more than one point on the cure. It fails the vertical line test.

For it to be a function, every input x must lead to exactly one output y
User Twibit
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