How can I find the equation of a parabola with focus (1,1) and directrix y=-x ?

Question

amistre64 · Answer

find the equation for it with a directrix at y=0 and then rotate the points by 45 degrees

anonymous · Answer

directrix at y is equal to 0 and then you have to rotate the points by 45 degres

amistre64 · Answer

the distance from 1,1 to 0,0 is sqrt(2) so address the problem as a parabola with focus are (0,sqrt(2)) and directrix at y=0

anonymous · Answer

What amistre 64 said! :D

amistre64 · Answer

there might be an easier way to do it, but I cant recall the details :)

anonymous · Answer

y^2=2sqrt(2)*(x-sqrt(2)/2)

So that is the equation for the parabola opening to the right.

Now I don't know how to rotate that equation.