It is C well if you see the line going horizontal that’s is the x-axis and the y-axis is going vertical and the -3 is the x and the -6 is the y so you look for the -3 in the left bottom side where it is all negative and and when you find it you look for the -6 in the y axis line where you move down. These are examples but this is where you can find it if it has a positive or negative or both
