The equation of the parabola shown can be written in the for

The equation of the parabola shown can be written in the form

y squared equals 4px

x squared equals 4py

Fill in the blank so that the resulting statement is true.

If 4p=-40

then the equation of the directrix is

4p = -40

So, we have :
y^2 = -40x
or
x^2 = -40y

So, for y^2 = -40x,
the directirx is given by the line
x = -p
x = 10

For x^2 = -40y,
the directrix is given by the line
y = -p
y = 10

So, to complete the statement,
it\'d be
the directrix is either x = 10 or y = 10 ----> ANSWER