Question

Which of the equations below could be the equation of this parabola?

Answer 1

x = - 2y^2

Explanation:

it's the answer I got

Answer 2

Parabolas like
`y=ax^2` have the y-axis as their symmetry axis, so options B and D are surely wrong.

Moreover, parabolas like
`x=ay^2` have the x-axis as their symmetry axis. If
`a>0` the parabola is concave rightwards, if
`a<0` the parabola is concave leftwards.

Since your parabola is concave leftwards, the only feasible option is
`x=-2y^2`