Identifying proportional relationships

Lessons

1. Is the relationship between the two variables proportional?

   1. x	y
      -1	-4
      1	4
      2	8
      3	12

   2. g	h
      0	1
      2	2
      4	3
      6	4

   3. r	t
      -6	-2
      -3	-1
      9	3
      14	4

2. Determine if the relationship between $x$ and $y$ is proportional by graphing.

   1. x	y
      -1	0
      1	1
      3	2
      5	3

   2. x	y
      0	0
      3	2
      6	4
      9	6

   3. x	y
      1	2
      2	5
      3	10
      4	17

3. Is the graph showing a proportional relationship?
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   2. 
      
      
   3.