Just draw a graph and plot them on the graph then count how many squares (in short) there is between them.
The answer is B.
Reason: Think of it this way, the bottom number of all 3 fractions are related to 12. 6*2 4*3 and 3*4..
X > -8
The line would be on -8 going to the left, the circle would not be shaded
Isolating the x^2 is the simplest way. it would only be three steps.
The given equation of parabola is

Which can also be written as

Here vertex (h,k) is (1,2)
And value of a is

Formula of focus is

Substituting the values of h,k and a, we will get

Therefore the correct option is the last option .