Linear and Quadratic Functions: Graphing Zeros and Min ⁄ Max Values

Section Warm-Up

In this section we will be graphing quadratic functions that are not in vertex form. Before we begin, let’s work through a warm-up activity that will help us with this section.

Analyze the following graphs. Notice the direction of the graph. Does it open upward or downward? Also, notice the point at which the graph changes direction. Keep your notes as they will help you with this section.

Graph of x squared minus three x plus 2
Graph of y = x2 – 3x + 2

Graph of negative x squared minus four x plus four
Graph of y = -x2 – 4x + 4