Question

ot consult anyone (and confirm this with your submission). You may take as much time as you wish, may R provided you tum in your quiz no later than Sunday, March ll. Show work/explanation where indicated. Answers without any work may earn little,if any, credit. You may type or write your work in your copy of the quiz, or if you prefer, create a document containing your worl Scanned work is acceptable also. In your document, be sure to include your name and the assertion of If you have any questions, please contact me by e-mail. (4 pts) Which of these graphs of relations describe y as a function ofx? That is, which are graphs of functions? Answer(s): o explanation required.) (There may be more than one graph which represents a function )

Answer 1

Function is a mapping from Set A (called domain) to Set B (called codomain) such that -

Every element of A is mapped to one and only one element of B.

(a)

It is a function because y is available for every value of x

also there are no x where 2 values are mapped to same x.

so yes it is a function

(b)

It is NOT a function because there are 2 values of y are mapped to every x.  

so it is NOT a function

(c)

(a)

It is a function because y is available for every value of x

also there are no x where 2 values are mapped to same x.

so yes it is a function

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