If the inequality symbol is ≤ or ≥ , then the region includes the parabola, so it should be graphed with a solid line. Otherwise, if the inequality symbol is < or > , the parabola should be drawn with a dotted line to indicate that the region does not include its boundary. Example: Graph the quadratic inequality.
The denominator of the fraction is four more than the numerator. The fraction:

If both numerator and denominator are increased by eight, the simplified result is 5/6:

The original fraction is 12/16.