This free PowerPoint document contains the graphs of 27 parabolas that you can cut, paste, and resize for use in your tests, quizzes, homework, or other classroom documents. Not for commercial use. All of the parabolas are of the form y=ax^2+bx+c, where a = 1. The first page of 9 graphs are all y = x^2 set on various scales. The remaining 18 graphs have the vertex along the x-axis and y-axis.