1. By querying the information of the third-class network, the first quadrant is located at the upper right of the coordinate system, in which the abscissa and ordinate are positive numbers. In this quadrant, the input and output values of the function are positive numbers.

2. The second quadrant is located at the upper left of the coordinate system, with negative abscissa and positive ordinate. In this quadrant, the input value of function is negative, but the output value is still positive.

3. The third quadrant is located at the lower left of the coordinate system, in which the abscissa and ordinate are negative. In this quadrant, the input and output values of the function are negative.

4. The fourth quadrant is located at the lower right of the coordinate system, with positive abscissa and negative ordinate. In this quadrant, the input value of function is positive, but the output value is still negative.