Answer :
so hmm check the picture below, it looks more or less like so, a parabolic frame with the focus point and on the tip from the stem coming from its center, the digital monitoring system.
[tex]\bf x=\cfrac{1}{12}y^2\implies 12x=y^2\implies \sqrt{12x}=y \\\\\\ \textit{now, what's \underline{y} when x = 3?}\qquad \sqrt{12(3)}=y[/tex]
[tex]\bf x=\cfrac{1}{12}y^2\implies 12x=y^2\implies \sqrt{12x}=y \\\\\\ \textit{now, what's \underline{y} when x = 3?}\qquad \sqrt{12(3)}=y[/tex]

Answer:
X = 1/12 y^2 12x = y^2 sqrt12x=y
Step-by-step explanation: