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Algebra Help Inverse One-to-one

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Did I do this right?

Problem:

If the following defines a one-to-one function, find its inverse. If no, write "Not one-to-one."

{(-2,4),(-1,4),(0,1),(1,-5)}
answer: Not one-to-one because of
(-2,4), (-1,4)

  • Algebra Help Inverse One-to-one -

    There is only one y for each x, so the original is indeed a function.
    However the inverse has those two values of y for x is 4 so the inverse is indeed not a function.

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