Negative abscissa (x), positive ordinate (y).
It is the description of a point in the first quadrant in a Cartesian plane.
If the point's ordinate, or y-coordinate, is zero then it must lie on the x-axis somewhere.
In the first case the point has positive abscissa as well as ordinate, whereas in the second, the abscissa is negative. But nothing "happens". The world does not end!
They are coordinates of points in the first quadrant, as well as on the semi-axes bounding the first quadrant.
The fourth quadrant
Coordinate is the common name. Abscissa is used for the information along the X-axis. Ordinate is used for the information along Y-axis. So abscissa is the x co-ordinate, and ordinate is the y co-ordinate. As they are both negative, then the point must be located in the third quadrant.
Negative abscissa (x), positive ordinate (y).
The 2nd quadrant and 4th quadrant would be where a point would lie if it's abscissa and ordinate are numerically equal but of opposite signs.
A point with a zero abscissa (x-coordinate) and a negative ordinate (y-coordinate) would lie in the fourth quadrant of the Cartesian coordinate system. In this quadrant, the x-coordinate is positive or zero, while the y-coordinate is negative. This means that the point would be to the right of the y-axis (positive x-direction) and below the x-axis (negative y-direction).
It is the description of a point in the first quadrant in a Cartesian plane.
The negative ordinate represents a negative y coordinate. A negative abscissa implies a negative x coordinate. Therefore the coordinate should look like (-x,-y). These coordinates are located at third quadrant.
2nd and 3rd quadrant
In Quadrant I a point would lie if its abscissa and ordinates are equal.
If the point's ordinate, or y-coordinate, is zero then it must lie on the x-axis somewhere.
You have to take some decisions. In a programming language, that might be done with an "if" statement.
up and another number on the zero line