parabola
The U-shaped (or upside-down-U) curve every quadratic graphs into.
A parabola is the graph of a quadratic function y=ax^2+bx+c. It opens upward when a>0 and downward when a<0, and it is a mirror image of itself across a single vertical line through its lowest or highest point.
Examples
y=x^2 graphs as a parabola opening upward with its lowest point at the origin.
See also
Point table
Graph settings
Calculator