Abscissa of a point is positive in

Question:

Abscissa of a point is positive in
(a) I and II quadrants
(b) I and IV quadrants
(c) I quadrant only
(d) II quadrant only

Solution:

(b) I and IV quadrants

​Explanation:
If abscissa of a point is positive, then the ordinate could be either positive or negative.
It means that the type of any point can be either (+,+) or (+, -). 
Points of the type (+,+) lie in quadrant I, whereas points of the type (+,-) lie in quadrant IV.

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