Exercise 20 Page 206

We want to draw the graph of a quadratic function written in standard form. To do so, we will follow five steps.

1. Identify $a,$ $b,$ and $c.$
2. Calculate and sketch the axis of symmetry.
3. Find and plot the vertex.
4. Find and plot the $y\text{-}$intercept and its symmetric point across the axis of symmetry.
5. Draw a smooth curve through the three plotted points.

Let's do it!

Identify $a,$ $b,$ and $c$

We will start by identifying the values of $a,$ $b,$ and $c.$