Page 790 - Algebra 1

LAB
10
Graphing Radical Functions
Graphing Calculator Lab (Use with Lesson 114)
A graphing calculator can be used to graph radical functions and to locate
points on the graph.
Graph the function y = 2√ x - 1.
1. To enter the equation into the Y= editor, press
the key. Then press 2
1.
2. Graph the function by pressing
6:ZStandard.
3. Press and use the key to move along
the x-axis until the cursor locates a point on the graph.
The first point on the graph appears to be (1.064, 0.505).
4. Investigate actual points on the graph of y = 2 √ x - 1 .
0 1. Then press
The first point on the graph is (1, 0). Note that this is different from (1.064, 0.505); the graph does not appear to pass through the point (1, 0). Therefore, it is important to use the Table feature to determine values of the function.
Press
.
Lab Practice
a. Graph the function y = 3√ x + 2. At what point does the graph start? b. Graph the function y = 2√ x + 2. At what point does the graph start?
Lab 10 775