The second quadrant is the part of the coordinate system where the -coordinates are negative and the -coordinates are positive. The point in question is, thus, in the upper left part of the coordinate system. The function value is -coordinate of that point.
Therefore, the function value for the point in the second quadrant, is
The fourth quadrant is the part of the coordinate system in where the -coordinates are positive and the -coordinates are negative. Therefore, the point is the one to the right. The -value can be found on the -axis.
The -value of the point in the fourth quadrant is