The point (0,-2) lies on which axis:-
A. +x-axis
B. +y-axis
C. -x-axis
D. -y-axis

Hint: In order to solve this problem we need to know that if the coordinate is given as (a, b) then a lies on x-axis and b lies on y-axis so if a = 0, b = -2 then the x coordinate is the origin and y coordinate is on negative of y-axis. Doing this will solve your problem.

Complete step-by-step answer:
The diagram of axes can be drawn as:

The asked point is (0,-2)
So, the x-coordinate is zero and y-coordinate is -2.
Which can be visualized in figure as:

Hence, the answer is –y-axis.
So, the correct option is D.

Note: In this problem we need to draw the axes to visualize the point where it can lie, where x is zero and y is a negative term. Sometimes location is asked in terms of ordinate and abscissa then you should also know that ordinate is the point on the y-axis and abscissa is the point on the x-axis. Then you can solve this problem and get the right answer.