Identify the quadrant in which the point with coordinates (10, -9) lies.

a.) quadrant i
b.) quadrant ii
c.) quadrant iii
d.) quadrant iv

The upper left quadrant is I (1), the upper right is II (2), lower left is III (3), and lower right is IV (4).

There are four quadrants of the Cartesian plane: I, II, III and IV. In this case, the point (10,-9) lies on the positive x-axis and on the negative y-axis. This premises are equivalent to the definition of the axes of D. Quadrant IV. The answer to this problem is quadrant IV>