What are the variables in each graph? describe how the variables are related at various points on the graph.

Graph A goes with #6. Graph B goes with #5. Graph C goes with #4. 

All you have to do is you look at the x-axis where the 1 is. Then you go up and see what number the point is on. Normally you can just solve with table goes with which graph after like the 2nd or 3rd one but I would do all 4 just in case 

X^2 - 4x +(4/2^2) + y^2 + 8y + (8/2^2) = -4 + (4/2^2) + (8/2^2)(x + 2)^2 + (y + 4)^2 = -4 + 4 + 16your center is (-2, -4) and the radius is the sqrt of -4 + 4 + 16 which is 4