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8.3 slope and y intercept                                                 March 02, 2012




       Solve for a.

       1. a ­ 3 = 5

       2. 4a + 4a ­ 7 = 17

       3. 5(2a + 4) = 30

       4. 8 ­ a = 12
                6
                                                      Bellwork
                            Objective: find and use slope to graph linear equations




HW pg. 414 #1­15                                                                           1
8.3 slope and y intercept                                          March 02, 2012




    3. (­5, ­40)      17. x   y               23. y = (1/2)x ­ 3
    5. y = ­2              ­1   ­3                   x   y
                            0    ­1                ­2   ­4
    7.y = ­4                1    1                  0    ­3
    9. y = ­6                                       2    ­2
                       19. x   y
    11. about 1,064 km     ­1   0
   13.  x   y                     0   0
        ­1   ­1                   1   0
         0    ­2                              25. y = (­3/2)x
         1    ­3                                     x   y
                            21. y = 4x + 16        ­2    3
    15. x   y                      x   y            0    0
         ­1   2                  ­2   8             2    ­3
          0   3                   0   16
          1   4                   2   24


      page 408 # 3 ­ 25 odd




HW pg. 414 #1­15                                                                    2
8.3 slope and y intercept                                  March 02, 2012




       Find the slope of each line.  




          slope =  rise =               slope =  rise = 
                   run                           run




HW pg. 414 #1­15                                                            3
8.3 slope and y intercept                                          March 02, 2012




      Find the slope of the line through C(­2, 6) and D(4, 3).  
               y  ­ y
      slope =  2      1
               x  ­ x
                2 1




       Find the slope through V(8, ­1) and Q(0, ­7)




HW pg. 414 #1­15                                                                    4
8.3 slope and y intercept              March 02, 2012




      Find the slope of each line.  




HW pg. 414 #1­15                                        5
8.3 slope and y intercept   March 02, 2012




                 1
           y = ­    x + 3
                   2
            y = mx + b




HW pg. 414 #1­15                             6
8.3 slope and y intercept                  March 02, 2012




       Graph using slope and y­intercept

       y = 2x ­ 3




HW pg. 414 #1­15                                            7
8.3 slope and y intercept                     March 02, 2012




              1
        y = ­    x + 3
               2

        y = mx + b

        Steps:
        1. List m and b
        2. Graph b.
        3. Use slope (m) to find next point
        4. Use straight edge to draw line.




HW pg. 414 #1­15                                               8
8.3 slope and y intercept                 March 02, 2012




      Graph using slope and y­intercept

      y = 2x ­ 3




HW pg. 414 #1­15                                           9
8.3 slope and y intercept   March 02, 2012




         2x ­ 3 = 3y




HW pg. 414 #1­15                             10
8.3 slope and y intercept         March 02, 2012




               HW pg 414 # 1­15




HW pg. 414 #1­15                                   11

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8.3 notes

  • 1. 8.3 slope and y intercept March 02, 2012 Solve for a. 1. a ­ 3 = 5 2. 4a + 4a ­ 7 = 17 3. 5(2a + 4) = 30 4. 8 ­ a = 12          6 Bellwork Objective: find and use slope to graph linear equations HW pg. 414 #1­15 1
  • 2. 8.3 slope and y intercept March 02, 2012 3. (­5, ­40) 17. x   y 23. y = (1/2)x ­ 3 5. y = ­2      ­1   ­3        x   y       0    ­1      ­2   ­4 7.y = ­4       1    1       0    ­3 9. y = ­6       2    ­2 19. x   y 11. about 1,064 km     ­1   0 13.  x   y       0   0      ­1   ­1       1   0       0    ­2 25. y = (­3/2)x       1    ­3        x   y 21. y = 4x + 16      ­2    3 15. x   y        x   y       0    0      ­1   2      ­2   8       2    ­3       0   3       0   16       1   4       2   24 page 408 # 3 ­ 25 odd HW pg. 414 #1­15 2
  • 3. 8.3 slope and y intercept March 02, 2012 Find the slope of each line.   slope =  rise =  slope =  rise =  run run HW pg. 414 #1­15 3
  • 4. 8.3 slope and y intercept March 02, 2012 Find the slope of the line through C(­2, 6) and D(4, 3).   y  ­ y slope =  2 1 x  ­ x 2 1 Find the slope through V(8, ­1) and Q(0, ­7) HW pg. 414 #1­15 4
  • 5. 8.3 slope and y intercept March 02, 2012 Find the slope of each line.   HW pg. 414 #1­15 5
  • 6. 8.3 slope and y intercept March 02, 2012 1 y = ­    x + 3 2 y = mx + b HW pg. 414 #1­15 6
  • 7. 8.3 slope and y intercept March 02, 2012 Graph using slope and y­intercept y = 2x ­ 3 HW pg. 414 #1­15 7
  • 8. 8.3 slope and y intercept March 02, 2012 1 y = ­    x + 3 2 y = mx + b Steps: 1. List m and b 2. Graph b. 3. Use slope (m) to find next point 4. Use straight edge to draw line. HW pg. 414 #1­15 8
  • 9. 8.3 slope and y intercept March 02, 2012 Graph using slope and y­intercept y = 2x ­ 3 HW pg. 414 #1­15 9
  • 10. 8.3 slope and y intercept March 02, 2012 2x ­ 3 = 3y HW pg. 414 #1­15 10
  • 11. 8.3 slope and y intercept March 02, 2012 HW pg 414 # 1­15 HW pg. 414 #1­15 11