What does the constant difference in the distances from any point on a hyperbola to its foci represent?

The length of the conjugate axis

The distance between the vertices

The distance from the center to a focus

According to its geometric definition, a hyperbola is the set of all points in a plane for which what property is constant?

The sum of the distances from two fixed points (foci).

The difference of the distances from two fixed points (foci).

The product of the distances from two fixed points (foci).

The ratio of the distances from two fixed points (foci).

It consists of two separate pieces called branches.