Chapter 8, Quadratics

Question 1

A quadratic function can be written in the form:

Answer 1

ax²+bx+c

where a, b, and c are constants with a ≠ 0.

Question 2

The x coordinate of the vertex of the graph of y=ax2+bx+c is given by:

Answer 2

x=-(b/2a)

To find the y coordinate, substitute the x value of the vertex into the equation.

Question 3

The vertex form of the equation of a parabola with vertex ( h, k) is:

Answer 3

y=a(x-h)²+k

Where a ≠ 0 is a constant. If a > 0,the parabola opens upward; if a < 0, then the parabola opens downward.