Graphing Quadratic Functions Using Vertex Form and Intercept Form
Concept

Zeros of a Parabola

A parabola can intersect the axis at zero, one, or two points. Since the function's value at an -intercept is always these points are called zeros, or sometimes roots.
zeros of a parabola

Zeros of a parabola are sometimes referred to as zeros of a function. These are the coordinates of the points where a parabola intersects the axis.

Exercises