Page 320 - Algebra 1

3L A B
Graphing Linear Functions
Graphing Calculator Lab (Use with Lesson 49)
While the graph of an equation can be drawn by hand, this method may be time-consuming. Also, it can be difficult to read exact values on a hand- drawn graph. A graphing calculator quickly creates an accurate graph of an equation.
Graph the line y = 2x + 7.
1. Enter the equation into the Y= editor. Press
the key. Then press 2 7.
2. Press and choose 6: ZStandard to view the graph of the equation in the standard
viewing window.
3. Place the cursor on the y-intercept by pressing . The cursor will automatically
appear on the y-intercept the first time the function is traced. The coordinates of the cursor are located at the bottom of the screen. The y-intercept for the line y = 2x + 7
is (0, 7).
4. While the cursor is tracing the y-intercept,
press . This will center the viewing window on the y-intercept.
5. Press and select 5: ZSquare. The graph
now appears to have a steeper incline. This is the most accurate picture of the graph ofy=2x+7.
Online Connection www.SaxonMathResources.com
Lab 3 305