Question

find the equation of the parabola whose vertex is O(0,0) and focus at (-7,0)​

Answer 1

Answer:

vortex : (0,0)

focus : (-7,0)

-a = -7

∴ a = 7

∴ equation of parabola :

$y {}^{2} = - 4ax$

$y {}^{2} = - 4 \times 7x$

$y {}^{2} = - 28x$

it is equation of parabola