Match the graphs to their equations
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  1. 1234567-1-2-3-4-5-6-71234567-1-2-3-4-5-6-7
  2. 1234567-1-2-3-4-5-6-71234567-1-2-3-4-5-6-7
  3. 1234567-1-2-3-4-5-6-71234567-1-2-3-4-5-6-7