Question

A parabola with a vertex at (0,0) has a focus along the negative part of the x-axis. which could be the equation of the parabola?

Answer 1

y^2 = -8x for example.

Explanation:

General form is y^2 = -4ax

The focus of this parabola will be at (-a , 0) on the x axis.

So the parabola might be:

y^2 = -4x

y^2 = -12x

y^2 = -0.9x and so on......