Algebra 1 · Quadratic Functions
Quadratic Function
Algebra 1 · Quadratic Functions
Definition
A quadratic function is a function of the form y = ax2 + bx + c whose graph is a parabola.
Examples
- y = x2 − 2x − 3 is a quadratic function.
- y = 2x2 + 1 is a quadratic function.
Key rule
The x2 term makes the graph a parabola.
Memory hook
Quadratic = has an x-squared, graphs as a parabola.