Question: The light bulb in a flashlight is at the focus of a parabolic reflector, s = 2.5 centimeters from the vertex of the reflector

The light bulb in a flashlight is at the focus of a parabolic reflector, s = 2.5 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.

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