Since the vertex of the parabola is at (0, 0) and focus is at (–2, 0). ∴ y = 0 ⇒ The axis of parabola is along x-axis ∴ The equation of the parabola is of the form $y^2$ = – 4ax The required equation of the parabola is $y^2$ = – 4 × 2x ⇒ $y^2$ = –8x.