Answer:
parallelogram
Step-by-step explanation:
(-11, 10) and (-6, 10) are endpoints of a horizontal segment with length 5.
(-9, 13) and (-4, 13) are endpoints of a horizontal segment with length 5.
Since the two segments above are congruent and parallel, the quadrilateral is a parallelogram.
Since all x-coordinates are different, there are no right angles, so the quadrilateral is not a rectangle.
Answer: parallelogram
