SOLUTION: Does every function have an inverse function? If so, is the inverse function also a function? Explain using an example.

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Question 983021: Does every function have an inverse function? If so, is the inverse function also a function? Explain using an example.
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
No. Restrictions are needed to obtain an inverse of some functions.
Know what makes a numeric relationship a function. Distinguish between a relation and a function.

Simple way to think is put a vertical line through the graph. Intersect in more than one point? If yes, then relation but not function. If no, only at one point maximum, then is function.