Order the group of quadratic functions from widest to narrowest graph.
y=-9x^2, y=1/3x^2, y=-1/2x^2

In a quadratic function, y = a(x²) the smaller the coefficient "a", the larger is the parabola:
From widest to narrowest:

1) y=1/3x² (Widest)

2) y= -1/2x² (Wider)

3) y=-9x² (narrowest)