A solar oven uses a parabolic reflector to focus the sun's rays at a point 5 inches from the vertex of the reflector (see figure). L = 5 inches
Write an equation for a cross section of the oven's reflector with its focus on the positive y axis and its vertex at the origin.
A) $$y = \frac { 1 } { 5 } x ^ { 2 }$$
B) $y = 5 x ^ { 2 }$
C) $y = 20 x ^ { 2 }$
D) $x ^ { 2 } = 20 y$
E) $$x ^ { 2 } = 5 y$$

Question

A solar oven uses a parabolic reflector to focus the sun's rays at a point 5 inches from the vertex of the reflector (see figure).  L = 5 inches ​
Write an equation for a cross section of the oven's reflector with its focus on the positive y axis and its vertex at the origin.
A)​ $$y = \frac { 1 } { 5 } x ^ { 2 }$$ ​ 
B) $y = 5 x ^ { 2 }$ 
C) $y = 20 x ^ { 2 }$ ​ 
D) $x ^ { 2 } = 20 y$ 
E) $$x ^ { 2 } = 5 y$$

Quizplus · Accepted Answer

The Answer of A solar oven uses a parabolic reflector to focus the sun's rays at a point 5 inches from the vertex of the reflector (see figure).  L = 5 inches ​
Write an equation for a cross section of the oven's reflector with its focus on the positive y axis and its vertex at the origin.
A)​ $$y = \frac { 1 } { 5 } x ^ { 2 }$$ ​ 
B) $y = 5 x ^ { 2 }$ 
C) $y = 20 x ^ { 2 }$ ​ 
D) $x ^ { 2 } = 20 y$ 
E) $$x ^ { 2 } = 5 y$$

A Solar Oven Uses a Parabolic Reflector to Focus the Sun's