The ordered pairs below represent three vertices of a rectangle.

(3, 3) (6, 3) (3, 8)

Graph the ordered pairs and select an ordered pair on the coordinate plane that could represent the location of the fourth vertex of the rectangle.

One possible ordered pair for the fourth vertex of the rectangle could be (6, 8).

By graphing the given ordered pairs (3, 3), (6, 3), and (3, 8) on a coordinate plane and connecting them in order, we can see that these points form a rectangle. To complete the rectangle, we can add the fourth vertex at point (6, 8), which forms a right angle with the other vertices and completes the rectangle shape.

Here is the graph with the ordered pairs (3, 3), (6, 3), (3, 8), and (6, 8) plotted on the coordinate plane:

```
(3,8) (6,8)

* -------------------- * (6,3)
| |
| |
| |
(3,3) ---------------- *
```