Which point is the center of the circle ?

Point X

Step-by-step explanation:

The point is in the middle of the circle

The question is asking to states on how can graphing be applied to solving systems of non-linear equation, and base on my research, I would say that when you have non linear equation and plot them, you can obtains the points where those function intersect, so they are possible solution. Constraints could be use as guide line or model.