white the equation of the parabola : focus (-3,5); vertex (-1,5)

Answer 1

the parabola opens to the left

(y-k)^2=4p(x-h)

p is the distance between the vertex and focus

you move from (-1,5) left (negative direction) to (-3,5)

therefore p=-2

(y-5)^2=-8(x+1)