Derive the equation of the parabola with a focus at (−5, 5) and a directrix of y = -1.

f(x) = −one twelfth (x − 5)2 + 2

f(x) = one twelfth (x − 5)2 + 2

f(x) = −one twelfth (x + 5)2 + 2

f(x) = one twelfth (x + 5)2 + 2

Question

Derive the equation of the parabola with a focus at (−5, 5) and a directrix of y = -1.

 f(x) = −one twelfth (x − 5)2 + 2

 f(x) = one twelfth (x − 5)2 + 2

 f(x) = −one twelfth (x + 5)2 + 2

 f(x) = one twelfth (x + 5)2 + 2

anonymous · Answer

im not good with directrix but i think it is d because this is what the graph looks like:|dw:1438022849329:dw|