An ordered pair (x,y) represents a point on a coordinate plane, where x is the horizontal position and y is the vertical position. The quadrant in which this point lies can be determined by the signs of the x and y coordinates.
The quadrant that contains the point (4,3) is Quadrant 1. This is because both the x-coordinate (4) and y-coordinate (3) are positive, indicating that the point lies in the top-right region of the coordinate plane.