1.   What is the constant rate of change between the quantities in the table?
   
    A. $10 per hour B. $40 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. -2 gal per minute B. 2 gal per minute
    C. -10 gal per minute D. -20 gal per minute
    Hint

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

  4.   What is the constant rate of change shown in the graph?
   
    A. 3 B. 6
    C. 4 D. 5
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  5.   What is the constant rate of change shown in the graph?
   
    A. $16 per lawn B. $20 per lawn
    C. $10 per lawn D. $5 per lawn
    Hint