In Precalc this week we learned how to solve quadratic inequalities. When its greater than or equal to and less than or equal to, the line is solid. And when it’s just <,> the line is dashed. Then you have to shade one side of the line, to figure out which side to shade use a test point, you can generally use the point (0,0). If it’s true shade the side with that coordinate, if not shade the other side.