Answer:
3 is the right one
Step-by-step explanation:
Simple math you know
The answer is use the perpendicular bisectors to find the center of the circle.
The equation of a parabola is:

If a>0, then the parabola opens up;
If a<0, then the parabola opens down.
The coordinates of focus are:
Answer:
x=1
Step-by-step explanation:
Just look at the x axis and see where the coordinate lands on and it's 1
Answer:
y=6x+24
Step-by-step explanation: