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  1. nipunmalhotra93
    • 3 years ago
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    a function from A to B is a set of points (x,y) where every x in A is related to one and only one y in B. a relation from A to B is a set of points (x,y) where every x in A is related to every other y in B. you can see here that for every x, f(x) has only one value. so, every x is mapped to a single y so it is a function

  2. Directrix
    • 3 years ago
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    @elizabethann509 Check out the vertical line test for a function. For those of us who are visual learners, it is convenient. See attached file.

  3. elizabethann509
    • 3 years ago
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    @Directrix I would do the vertical/horizontal line tests but I don't understand how they work. I learned about them in class but I still don't understand.. I'm awful at math.

  4. Directrix
    • 3 years ago
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    @elizabethann509 Are you online now?

  5. Directrix
    • 3 years ago
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    @elizabethann509 Do you know the definition of a function - the part that talks about for every x, there is at most one y that is paired with that x?

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