Chapter 9 - Quadratic Functions and Equations - 9-1 Quadratic Graphs and Their Properties - Lesson Check - Page 549: 5

The equation of a parabola is $ax^2+bx+c = 0$ The vertex of a parabola is the minimum point when $a$ is positive, and the vertex of a parabola is the maximum when $a$ is negative.

The equation of a parabola is $ax^2+bx+c = 0$ The vertex of a parabola is the minimum point when $a$ is positive, and the vertex of a parabola is the maximum when $a$ is negative.