Regan is trying to find the equation of a quadratic that has a focus of (–2, 5) and a directrix of y = 13. Describe to Regan your preferred method for deriving the equation. Make sure you use Regan's situation as a model to help her understand.

Question

adrianna.gongora · Answer

f(x) = 3(x + 4)^2 + 1 
g(x) = 2x^2 - 16x + 15 
h(x) = a(x - 1) - 3 
axis of symmetry? 

Axis of symmetry for f(x) is x=-4 

For g(x) 

Taking the derivative 

g'(x) = 4x - 16 
= 4(x - 4) 

Axis of symmetry for g(x) is x=4 

Axis of symmetry for h(x) is x=1


Is the answer -.- I figured it out.