How do we graph parabolas?

 The graphs of quadratic functions are called parabolas.  

Example :

All parabolas are “U” shaped and they will have a highest or lowest point that is called the vertex.  Parabolas may open up or down and may or may not have x-intercepts and they will always have a single y-intercept. The dashed line with each of these parabolas is called the axis of symmetry. 


Now to graph a parabola , lets use the equation y=x^2+x-2
You write that in a graphing calculator and it wil give you a table of what x equals and what y equals and you graph the parabola.