The equation of a circle is shown below.
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Answer:
<h3>b. x=1/28 y^2</h3>Step-by-step explanation:
the standard equation,
---(1) , when opening towards left or right
focus at (a , 0)
---(2) , when opening towards top or bottom
focus at (0, a)
if a is negative parabola will open toward negative axes ( down or left) and vice versa.
re- arranging option b. we get
-----(3)
therefore, a = -7
(3) is similar to (1)
So it is facing left with focus at (-7,0)