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What is the answer choice to this problem? Thank you!?
A cross section of the reflector shown is in the shape of a parabola. Which is the equation for the cross section?
a. y^2 = 4x
b. y^2 = 8x
c. x^2 = 4y
d. x^2 = 8y
- PuzzlingLv 72 months agoFavorite Answer
It's a *horizontal* parabola, so it will have a y² term and have the following form:
y² = kx
You can see you have one point (x,y) = (2,4). Plug that in and solve for k:
4² = 2k
16 = 2k
k = 16/2
k = 8
y² = 8x
Take a look at the graph of the cross-section in the link below.Source(s): https://www.desmos.com/calculator/6c8qcauy5p
- ?Lv 72 months ago
A cross section of the reflector shown is in the shape of a parabola.
The equation for the cross section: a. y^2 = 4x b. y^2 = 8x ====> Answer c. x^2 = 4yd. x^2 = 8y