The distance from the green point on the parabola to the parabola's focus is 11. what is the distance from the green point to the directrix

ANSWER

It is 11

APEX APPROVE

Step-by-step explanation:

Let the green point on the parabola be P.

Let the focus of the parabola be F.

Let M be the point on the directrix where the perpendicular from P intersects.

We know that for a conic,  and for a parabola, e = 1.

So,

FP = PM

It is given that the distance between the green point and the focus is 9.

That is, FP = 9.

So, PM = 9.

Hence, the distance between the green point and the directrix = 9