Graphing quadratic inequalities in two variables

Lessons

• 1.
  Graphing Quadratic Inequalities of Parabolas Opening Up
  Graph:
  i) $y = \frac{1}{3}{x^2} - \frac{2}{3}x - \frac{8}{3}$
  ii) $y \ge \frac{1}{3}{x^2} - \frac{2}{3}x - \frac{8}{3}$
  iii) $y$ < $\frac{1}{3}{x^2} - \frac{2}{3}x - \frac{8}{3}$
  

---

• 2.
  Graphing Quadratic Inequalities of Parabolas Opening Down
  Graph:
  i) $y = - {x^2} - 4x$
  ii) $y$ > $- {x^2} - 4x$
  iii) $y \le - {x^2} - 4x$
  

---