1.   What is the constant rate of change between the quantities in the table?
   
    A. $40 per hour B. $10 per hour
    C. $5 per hour D. $1 per hour
    Hint

  2.   What is the constant rate of change between the quantities in the table?
   
    A. 15 calories per minute B. 40 calories per minute
    C. 4 calories per minute D. 60 calories per minute
    Hint

  3.   What is the constant rate of change between the quantities in the table?
   
    A. 2 legs per dog B. 40 legs per dog
    C. 4 dogs per leg D. 4 legs per dog
    Hint

  4.   What is the constant rate of change shown in the graph?
   
    A. 5 B. 3
    C. 6 D. 4
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  5.   What is the constant rate of change shown in the graph?
   
    A. 0 lbs per person B. 0.5 lb per person
    C. 1 lb per person D. 2 lbs per person
    Hint