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Sagot :
The required equation of parabola is y = (-1/4)(x-9)² +4
What is a Parabola ?
A parabola is a U shaped Curve , whose all point are at same distance from a point called as Focus and a line called as Directrix.
Let (x,y) be any point on the parabola.
the distance between (x,y) and the focus and the distance between (x,y) and directrix is equal.
The focus is at (9,0) and a directrix at y= - 4
[tex]\rm \sqrt {(x-9)^2 + (y -0)^2[/tex] = | y +4|
[tex]\rm {(x-9)^2 + (y -0)^2 = (y-4)^2[/tex]
(x-9)² + y² = y² +16 -4y
On solving this
4y = - (x-9)² +16
y = (-1/4)(x-9)² +4
Therefore this is the required equation of parabola .
To know more about Parabola
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