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Find the equation of parabola whose focus (-4,0) & vertex (0,0)?

$\begin{array}{1 1}(a)\;y_1^2=-15x_1\\(b)\;y_1^2=-16x_1\\(c)\;y_1=-15x_1^2\\(d)\;y_1^3=-15x_1^2\end{array}$

1 Answer

Z is a point passes through directix and also axis of parabola.
Equation of directix $(y-0)=\large\frac{-4}{0}$$(x-4)$
Let $P(x_1,y_1)$ be a point on parabola
Hence (b) is the correct answer.
answered Feb 5, 2014 by sreemathi.v