First off, if it's mixed, you'd want to convert it to "improper" first, and then do the division... say hmm - 3 and 1/7

the line over the decimal part is because is a "recurrent decimal", or repeating one.
Answer:
Parallelogram
Explanation:
Since there are four points, this is a quadrilateral.
There is a slope during the points. Therefore it could not be a rectangle nor square. The sides are still parallel though.
The length is not equal too, so it could not be a rhombus.
If you plot these points to the graph and connect them, it would form a parallelogram.
X < -6 is the first graph
x < 6 is the second graph
x ≥ 6 is the fourth graph
x ≥ -6 is the third graph
x ≤ 6 is the last graph
Hope it helps :)