Geom13-1
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Geom13-1 Document Transcript

  • 1. Geom13­1.notebook December 10, 2011 BELL WORK: What do you remember about graphing lines? Draw an x­ y­ coordinate graph,  y 6 and graph the following line.  5 Use any method you remember. 4 3 2 y = 2x ­ 1 1 x ­6 ­5 ­4 ­3 ­2 ­1 0 1 2 3 4 5 6 ­1 ­2 ­3 ­4 ­5 ­6 Agenda for the day: 1. Today, we will begin Ch. 13.  2. You will have an exit slip. Look ahead: 1. We will cover the first 3 sections of Ch. 13.  2. After that, we will begin reviewing for the final.  Just 3 more lessons! 1
  • 2. Geom13­1.notebook December 10, 2011 After this lesson, you should be able to graph lines and  circles using any of 3 methods. Looking back at the BELL WORK,  use your white boards to show me the graph you came up with. Lets graph this line like a defensive lineman: Put your head down, and push through step by step. y = 2x ­ 1 6 y 5 x  y   4 3 2 1 x ­6 ­5 ­4 ­3 ­2 ­1 0 1 2 3 4 5 6 ­1 ­2 ­3 ­4 ­5 ­6 2
  • 3. Geom13­1.notebook December 10, 2011 Now lets do the problem like a ballerina, elegantly! y y = 2x ­ 1 5 4 y­intercept: 3 2 1 x slope: ­6 ­5 ­4 ­3 ­2 ­1 0 1 2 3 4 5 6 ­1 ­2 ­3 ­4 ­5 ­6 Examples: y 6 5 y = 3x ­ 3 4 3 2 x = 1 1 x ­6 ­5 ­4 ­3 ­2 ­1 0 1 2 3 4 5 6 2y + 4 = ­x ­1 ­2 ­3 y = ­2 ­4 ­5 ­6 3
  • 4. Geom13­1.notebook December 10, 2011 Lets take a look at p.606 #3 (x­1)2 + (y­2)2 = 25 y 6 5 4 3 2 1 x ­6 ­5 ­4 ­3 ­2 ­1 0 1 2 3 4 5 6 ­1 ­2 ­3 ­4 ­5 ­6 Finding x­ and y­ intercepts: y 6 5 Find the intercepts of y = 4x ­ 2 4 3 2 1 x ­6 ­5 ­4 ­3 ­2 ­1 0 1 2 3 4 5 6 ­1 ­2 ­3 ­4 ­5 ­6 4
  • 5. Geom13­1.notebook December 10, 2011 Who has their calculator?  Graphing on calculator. Finding x­intercepts: MENU, TRACE      or MENU, ANALYZE GRAPH, ZERO Finding y­intercepts: MENU, TRACE, 5
  • 6. Geom13­1.notebook December 10, 2011 EXIT SLIP: Graph the following equation by making a table of x­ and  y­ values. I must see your table and graph. Check your work using  your calculator. y = x ­ 1 Homework: p. 607 #2­8,10 due Monday 6