Quadrant 1 is located where x and y are both positive
Quadrant 2 is located where x is negative and y is positive.
Quadrant 3 is located where x and y are both negative
Quadrant 4 s located where x is positive and y is negative.
Since the point (9, 12) has a positive x and a positive y,
it must lie in quadrant 1 on the coordinate system.
