If k 0 the vertex is a minimum turning point If k 0 the vertex is a maximum. Some Common Traits of Quadratic Functions. For example two standard form quadratic equations are fx x 2 2x 1 and fx 9x 2 10x -8.
A quadratic equation contains terms up to x2.
Y x 2 - 5. To save your graphs. The graph of a quadratic function is a parabola. When youre trying to graph a quadratic equation making a table of values can be really helpful.