SOLUTION: Find the vertex, focus, directrix, and axis of symmetry of each parabola. We have been using the formulas y-k=a(x-h)^2 and x-h=a(y-k)^2 I don't understand which to use here, e

Algebra ->  Quadratic-relations-and-conic-sections -> SOLUTION: Find the vertex, focus, directrix, and axis of symmetry of each parabola. We have been using the formulas y-k=a(x-h)^2 and x-h=a(y-k)^2 I don't understand which to use here, e      Log On


   



Question 193376This question is from textbook algebra and trigonometry structure and method book 2
: Find the vertex, focus, directrix, and axis of symmetry of each parabola.

We have been using the formulas y-k=a(x-h)^2 and x-h=a(y-k)^2 I don't understand which to use here, even after completing the square and its confusing because I don't know which is which. please explain and be specific. thank you.
This question is from textbook algebra and trigonometry structure and method book 2

Answer by solver91311(24713) About Me  (Show Source):
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You have to share the specific problems if you want specific help. But in general, if x is the squared variable, the parabola opens either up or down (up if a is positive, down if negative). If y is the squared variable, it opens right or left (right if a is positive, left if a is negative).


John