12. Quadratic Equations and Functions

Which equation from choices $A-D$ matches the quadratic graph below.

Determine if the parabola opens up or down.

$y=-2x^2-6x-7$

Determine if the parabola opens up or down.

$y=\frac{1}{2}{x}^2-5x$

Graph each quadratic equation by finding and plotting ordered pair solutions.

$y=-3x^2$