12. Quadratic Equations and Functions

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.

$y=-3x^2$

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

$y=2x^2+5$