Unlike the graphs of linear functions, the graphs of quadratic functions do not look like straight line. Specifically, the graphs of quadratic functions are U-shaped curve called parabolas. In this sub-topic, we will learn about quadratic graphs and their features when the coefficient of x² is positive or negative.

Graphs of quadratic function have the following shapes of a parabola. The orientation of graph can be either open upwards or open downwards depending upon the coefficient of x² in the given quadratic function.