# mathematics

Find the domain and range of the relation and determine whether it is a function.

A graph with four points plotted is shown. The points are located at left parenthesis negative 4 comma negative 1 right parenthesis, left parenthesis negative 1 comma 4 right parenthesis, left parenthesis 1 comma 1 right parenthesis, left parenthesis 4 comma 1 right parenthesis.
A. Domain: Left brace negative 4 comma negative 1 comma 1 comma 4 right brace; Range: Left brace negative 1 comma 1 comma 4 right brace; Yes, the relation is a function.
B. Domain: Left brace negative 4 comma negative 1 comma 1 comma 4 right brace; Range: Left brace negative 1 comma 1 comma 4 right brace; No, the relation is not a function.
C. Domain: Left brace negative 1 comma 1 comma 4 right brace; Range: Left brace negative 4 comma negative 1 comma 1 comma 4 right brace; Yes, the relation is a function.
D. Domain: Left brace negative 1 comma 1 comma 4 right brace; Range: Left brace negative 4 comma negative 1 comma 1 comma 4 right brace; No, the relation is not a function.

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1. Are you saying:
A graph with four points plotted is shown. The points are (-4,-1), (-1,4) , (1,1) , (4,1) etc ???
Why not just type it like that ?

I don't think anybody is going to wade through all this type of post trying to figure out what you are saying.

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Reiny
2. in any case, the domain is the set of all the 1st coordinates and the range is the set of all the second coordinates.

It is a function if each domain element is used exactly once.

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oobleck

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