Chapter 10.5, Problem 1E

If the transverse axis of a hyperbola is vertical, what do we know about the graph?

The light bulb in a flashlight is at the focus of the parabolic reflector, 1.5 centimeters from the vertex of the reflector (see figure). Write an equation for a cross section of the flashlight’s reflector with its focus on the positive x-axis and its vertex at the origin.

Find the focus and directrix of the parabola y=14x2. Then sketch the parabola.