The points represented are:

The domain is the set of all the inputs, i.e. the set composed by the x-coordinates of these points.
The range is the set of all the outputs, i.e. the set composed by the y-coordinates of these points.
This relation is a function, because you never map two outputs for the same input (i.e. you don't have two points with the same x-coordinate, but different y-coordinates).
Answer:
3 4/15
Step-by-step explanation:
Perimiter is width plus width plus length plus length and they give you the width but since there is two widths you have to add the widths then subtract that from 11 1/5 and the answer from that gets divided by two.
If wrong let me know and i will try again
Answer:
Margie spent $27.05.
Step-by-step explanation:
1.5 * 2 + 14 * 1.6 + 1 * 1.65 = 27.05.
Answer:
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Step-by-step explanation:
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