Angelito

the -1/4 is the SLOPE. You have a POINT. By definition, in order to be PARALLEL, two lines must have the SAME SLOPE. Is there some specified form for your final answer equation? There is only one formula that I can think of that would work in this case. ....

Square root it to make it a little easier to see first. x-1+y=6 or x+y=7. The center has to be some point with coordinates (x,y). A radius is half of the diameter across that runs through the center. Drawing a labled circle would be a good idea.

See below.

Your center is (1 or -1,0). Y^2-0 is still y^2.

I want the correct answer

The numbers in the circles go together in a certain way Find the missing number marked by the question mark: 180, 14 120, 8 ___? 4 220, 18