I need help with the graphing. I always get confused were to graph and how to graph

Given the vertices of a polygon
[tex](4,-2),(-2,-5),(-2,1),(4,0)[/tex]Each vertex has an x-coordinate and a y-coordinate
The graph of the polygon is as shown in the following figure:
As shown, the polygon has two parallel sides only
so, the polygon is: Trapezoid