Evaluate the center, vertices, foci,length of major axis and the equation the directrices of the curve:
(x-1)^2/16 - (y-3)^2/9 = -1


Isn't this a hyperbola? Which form should be used here? That of conjugate hyperbola?

I'm pretty sure the answer to that question is (x−1) 1/8 − (y−3) 2/9