Which of the quadratic functions has the narrowest graph?

Step-by-step explanation:

A quadratic function has the formula ax² + bx + c

To determine if a graph will be narrow or wide, the leading coefficient, a, will be the factor that determines thisThe greater the coefficient, the narrower the parabolaThe lesser the coefficient, the wider the parabola

Here all of the functions are in the form ax²

In , our "a" term is In y = -2x², our "a" term is -2In y = -3x², our "a" term is -3In , our "a" term is

We can eliminate the two functions with the negative coefficients because they are much smaller than the two functions with the fractions as coefficients, and will therefore open much wider.

We can now compare the two remaining functions, and  

Giving the two fractions common denominators would turn them into and The equation with the larger fraction will be the parabola that is the narrowest. In this case, it is the . Therefore, will have the narrowest graph