The problem in my book about conics states:

"A hyperbolic mirror is a mirror in the shape of one branch of a hyperbola. Such a mirror reflects light rays directed at one focus toward the other focus. Suppose a hyperbolic mirror is modeled by the upper branch of the hyperbola with equation: y^2/9-x^2/16=1. A light source is located at (-10, 0). Where should the light from the source hit the mirror so that the light will be reflected to (0, -5)?"

I am confused an do not know where to start. Sorry for such an ambiguous question, but basically, I just need a subtle push to the right start.