A relation contains the points left parenthesis negative 5 comma negative 10 right parenthesis, left parenthesis negative 2 comma negative 4 right parenthesis, left parenthesis negative 1 comma negative 2 right parenthesis, left parenthesis 4 comma 8 right parenthesis and left parenthesis 5 comma 10 right parenthesis. Is this a function? Explain
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No, this is not a function. A function is a relation in which each input has only one output. In this relation, the input -2 has two outputs, -4 and -2, so it is not a function.
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