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Lesson 4­2.notebook                                                   November 29, 2012


           Assignment:

           1­­>L4.2, pg. 227, #2 ­ 30 (evens) ­ Due Monday (12/3)
           2­­>L4.3, pg. 233­234, #2­34 (evens) ­ Due Monday (12/3)

           3­­>Chapter 3 Test signed for extra credit

           4­­>Chapter 4 Test ­ Monday (12/10)




                                                                                          1
Lesson 4­2.notebook                                                   November 29, 2012


           Lesson 4.2 WarmUp:
           Graph the following equations by finding the x­intercept
           and the y­intercept.
           1) x  +  y  =  ­3


           2) 2x  ­  y  =  6


           3) ­5x  +  y  =  1


           4) 5x  +  2y  =  8


           5) y = ­2x  ­  4




                                                                                          2
Lesson 4­2.notebook                                                            November 29, 2012

            Lesson 4.2:

            *FYI...if we have any point and the slope...we can write the 
            equation of the line by "plugging them into the slope­intercept 
            form and finding the y­intercept!


            Ex­­>the line goes through (2,1) and has a slope of 3:




                                                                                                   3
Lesson 4­2.notebook                                                              November 29, 2012


           *FYI #2...if we have any 2 points...we can also write the equation 
           for the line!


           Ex­­>the line goes through (3, 1) and (2, 4)




                                                                                                     4
Lesson 4­2.notebook                                                                    November 29, 2012

            Lesson 4.2 examples:
            Write an equation of the line that passes through the given point and has the given 
            slope.
            A) (3, ­3); slope:  3



            B)    (1, 5); slope:  ­1



            C)    (4, 2); slope:  1/2




                                                                                                           5
Lesson 4­2.notebook                                                                 November 29, 2012

           Write an equation of the line that passes through each pair of points.
           D) (4, ­3), (2, 3)




           E)    (­1, 3), (0, 8)




           F)    (­2, ­4), (2, 4)




                                                                                                        6

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8th alg -l4.2--nov29

  • 1. Lesson 4­2.notebook November 29, 2012 Assignment: 1­­>L4.2, pg. 227, #2 ­ 30 (evens) ­ Due Monday (12/3) 2­­>L4.3, pg. 233­234, #2­34 (evens) ­ Due Monday (12/3) 3­­>Chapter 3 Test signed for extra credit 4­­>Chapter 4 Test ­ Monday (12/10) 1
  • 2. Lesson 4­2.notebook November 29, 2012 Lesson 4.2 WarmUp: Graph the following equations by finding the x­intercept and the y­intercept. 1) x  +  y  =  ­3 2) 2x  ­  y  =  6 3) ­5x  +  y  =  1 4) 5x  +  2y  =  8 5) y = ­2x  ­  4 2
  • 3. Lesson 4­2.notebook November 29, 2012 Lesson 4.2: *FYI...if we have any point and the slope...we can write the  equation of the line by "plugging them into the slope­intercept  form and finding the y­intercept! Ex­­>the line goes through (2,1) and has a slope of 3: 3
  • 4. Lesson 4­2.notebook November 29, 2012 *FYI #2...if we have any 2 points...we can also write the equation  for the line! Ex­­>the line goes through (3, 1) and (2, 4) 4
  • 5. Lesson 4­2.notebook November 29, 2012 Lesson 4.2 examples: Write an equation of the line that passes through the given point and has the given  slope. A) (3, ­3); slope:  3 B) (1, 5); slope:  ­1 C) (4, 2); slope:  1/2 5
  • 6. Lesson 4­2.notebook November 29, 2012 Write an equation of the line that passes through each pair of points. D) (4, ­3), (2, 3) E) (­1, 3), (0, 8) F) (­2, ­4), (2, 4) 6