We want to locate the point (7,-6). The first number indicates how many units we need to move on the x axis, and the second indicates the number of units we need to move on the y axis. If the numbers are positive, we need to move in the positive direction and if it is negative, we need to move on the negative direction.
So, for the x axis, the positive direction is going to the right. As the point is (7,-6), this means that we need to move 7 units to the right. For the y axis, the positive direction is going up, so we need to move 6 units down.
The only point that is 7 units to the right and 6 units down from the (0,0) is point O. So the correct option is point O