Graphing Parabolas An easy method for graphing parabolas involves preparing a chart. Of course, the graphing calculator can also be used for graphing.The graphs of quadratic functions, f (x) = ax2 + bx + c, are called parabolas.Shape of the Graph:Parabolas have a shape that resembles (but is not the same as) the letter U. Parabolas may open upward or … [Read more...] about Graphing Parabolas