Question

Which of the following best describes a single fixed point that is the same distance from the parabola as the directrix is from the parabola?

a) The vertex
b) The focus
c) The asymptote
d) The intercept

Answer 1

The correct answer is b) The focus. A parabola has a focus that is equidistant from the parabola as the directrix is.

Step-by-step explanation:

The correct answer is b) The focus.

A parabola is a U-shaped curve that has a focus and a directrix. The focus is a single fixed point on the parabola that is equidistant from the parabola as the directrix is.

It is the point where the parallel rays reflecting off the parabolic mirror cross at a single point.