Given:
The coordinates of a point are (-3,-6).
To find:
The point on the coordinate plane whose coordinates are (-3,-6).
Solution:
From the given information of coordinate plane, it is clear that
Coordinates of point A are (-3, 6).
Coordinates of point B are (-6,-3)
Coordinates of point C are (-3,-6)
Coordinates of point D are (3,-6)
It is clear that, only point C has coordinates (-3,-6).
So, the required point is C.
Therefore, the correct option is C.