Core Connections Algebra 1, 2013
CC
Core Connections Algebra 1, 2013 View details
2. Section 8.2
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Exercise 58 Page 389

We want to graph the given quadratic function, find its vertex, intercepts, and intercept. Let's do those things one at a time.

Graphing

To graph the given quadratic function, we can start by making a table of values using five points.

Now, we can graph the function by plotting the points from the table. Because the graph of a quadratic function is a parabola, we will connect them with a smooth curve.

intercept

The point where a graph crosses the axis is called the intercept. Let's find it on our graph!

As we can see, the intercept of the given function is

intercept

The points where a graph crosses the axis are called the intercepts. Let's find them on our graph!

As we can see, the intercepts of the given function are and

Vertex

Because a parabola either opens upward or downward, there is always one point that is the absolute maximum or absolute minimum of the function. This point is called the vertex. Since the parabola of the given function opens upward, the vertex is be the lowest point of the graph. Let's find it!

As we can see, the vertex of the given function is